--- a/testing/mozharness/configs/single_locale/ash_android-api-15.py
+++ b/testing/mozharness/configs/single_locale/ash_android-api-15.py
@@ -23,29 +23,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/projects/ash",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/l10n-central",
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
 
     "l10n_dir": "l10n-central",
     "repack_env": {
         # so ugly, bug 951238

--- a/testing/mozharness/configs/single_locale/ash_android-api-9.py
+++ b/testing/mozharness/configs/single_locale/ash_android-api-9.py
@@ -23,29 +23,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/projects/ash",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/l10n-central",
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
 
     "l10n_dir": "l10n-central",
     "repack_env": {
         # so ugly, bug 951238

--- a/testing/mozharness/configs/single_locale/mozilla-aurora_android-api-15.py
+++ b/testing/mozharness/configs/single_locale/mozilla-aurora_android-api-15.py
@@ -23,29 +23,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/releases/mozilla-aurora",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/releases/l10n/%s" % BRANCH,
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
 
     "l10n_dir": MOZILLA_DIR,
     "repack_env": {
         # so ugly, bug 951238

--- a/testing/mozharness/configs/single_locale/mozilla-aurora_android-api-9.py
+++ b/testing/mozharness/configs/single_locale/mozilla-aurora_android-api-9.py
@@ -23,29 +23,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/releases/mozilla-aurora",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/releases/l10n/%s" % BRANCH,
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
 
     "l10n_dir": MOZILLA_DIR,
     "repack_env": {
         # so ugly, bug 951238

--- a/testing/mozharness/configs/single_locale/mozilla-central_android-api-15.py
+++ b/testing/mozharness/configs/single_locale/mozilla-central_android-api-15.py
@@ -23,29 +23,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/mozilla-central",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/l10n-central",
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
 
     "l10n_dir": "l10n-central",
     "repack_env": {
         # so ugly, bug 951238

--- a/testing/mozharness/configs/single_locale/mozilla-central_android-api-9.py
+++ b/testing/mozharness/configs/single_locale/mozilla-central_android-api-9.py
@@ -23,29 +23,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/mozilla-central",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/l10n-central",
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
 
     "l10n_dir": "l10n-central",
     "repack_env": {
         # so ugly, bug 951238

--- a/testing/mozharness/configs/single_locale/release_mozilla-beta_android_api_15.py
+++ b/testing/mozharness/configs/single_locale/release_mozilla-beta_android_api_15.py
@@ -24,29 +24,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/releases/mozilla-beta",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/releases/l10n/%s" % BRANCH,
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
     "l10n_dir": MOZILLA_DIR,
 
     "release_config_file": "buildbot-configs/mozilla/release-fennec-mozilla-beta.py",
     "repack_env": {

--- a/testing/mozharness/configs/single_locale/release_mozilla-beta_android_api_9.py
+++ b/testing/mozharness/configs/single_locale/release_mozilla-beta_android_api_9.py
@@ -24,29 +24,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/releases/mozilla-beta",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/releases/l10n/%s" % BRANCH,
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
     "l10n_dir": MOZILLA_DIR,
 
     "release_config_file": "buildbot-configs/mozilla/release-fennec-mozilla-beta.py",
     "repack_env": {

--- a/testing/mozharness/configs/single_locale/release_mozilla-release_android_api_15.py
+++ b/testing/mozharness/configs/single_locale/release_mozilla-release_android_api_15.py
@@ -24,29 +24,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/releases/mozilla-release",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/releases/l10n/%s" % BRANCH,
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
     "l10n_dir": MOZILLA_DIR,
 
     "release_config_file": "buildbot-configs/mozilla/release-fennec-mozilla-release.py",
     "repack_env": {

--- a/testing/mozharness/configs/single_locale/release_mozilla-release_android_api_9.py
+++ b/testing/mozharness/configs/single_locale/release_mozilla-release_android_api_9.py
@@ -24,29 +24,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/releases/mozilla-release",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/build/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/build/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/build/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/releases/l10n/%s" % BRANCH,
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
     "l10n_dir": MOZILLA_DIR,
 
     "release_config_file": "buildbot-configs/mozilla/release-fennec-mozilla-release.py",
     "repack_env": {

--- a/testing/mozharness/configs/single_locale/staging_release_mozilla-release_android_api_15.py
+++ b/testing/mozharness/configs/single_locale/staging_release_mozilla-release_android_api_15.py
@@ -27,25 +27,25 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/mozilla-release",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/compare-locales",
         "revision": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/%(user_repo_override)s/",
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,

--- a/testing/mozharness/configs/single_locale/staging_release_mozilla-release_android_api_9.py
+++ b/testing/mozharness/configs/single_locale/staging_release_mozilla-release_android_api_9.py
@@ -27,29 +27,29 @@ config = {
         "manifest": "mobile/android/config/tooltool-manifests/android/releng.manifest",
         "output_dir": "%(abs_work_dir)s/" + MOZILLA_DIR,
     },
     "exes": {
         'tooltool.py': '/builds/tooltool.py',
     },
     "repos": [{
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/mozilla-release",
-        "revision": "default",
+        "branch": "default",
         "dest": MOZILLA_DIR,
     }, {
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/buildbot-configs",
-        "revision": "default",
+        "branch": "default",
         "dest": "buildbot-configs"
     }, {
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/tools",
-        "revision": "default",
+        "branch": "default",
         "dest": "tools"
     }, {
         "repo": "https://hg.mozilla.org/%(user_repo_override)s/compare-locales",
-        "revision": "RELEASE_AUTOMATION"
+        "branch": "RELEASE_AUTOMATION"
     }],
     "hg_l10n_base": "https://hg.mozilla.org/%(user_repo_override)s/",
     "hg_l10n_tag": "default",
     'vcs_share_base': HG_SHARE_BASE_DIR,
     "l10n_dir": MOZILLA_DIR,
 
     "release_config_file": "buildbot-configs/mozilla/staging_release-fennec-mozilla-release.py",
     "repack_env": {