diff --git a/.taskcluster.yml b/.taskcluster.yml
index 10887004d..b3734e417 100644
--- a/.taskcluster.yml
+++ b/.taskcluster.yml
@@ -99,6 +99,7 @@ tasks:
               MOBILE_HEAD_REV: ${head_rev}
               MOBILE_TRIGGERED_BY: ${user}
               SCHEDULER_ID: ${scheduler_id}
+              SHORT_HEAD_BRANCH: ${short_head_branch}
               TASK_ID: ${decision_task_id}
               TASKS_PRIORITY: ${tasks_priority}
               TRUST_LEVEL: ${trust_level}
diff --git a/automation/taskcluster/decision_task.py b/automation/taskcluster/decision_task.py
index 4a0c81c36..70b98443d 100644
--- a/automation/taskcluster/decision_task.py
+++ b/automation/taskcluster/decision_task.py
@@ -31,6 +31,7 @@ BUILDER = TaskBuilder(
     task_id=os.environ.get('TASK_ID'),
     repo_url=REPO_URL,
     git_ref=os.environ.get('MOBILE_HEAD_BRANCH'),
+    short_head_branch=os.environ.get('SHORT_HEAD_BRANCH'),
     commit=COMMIT,
     owner="fenix-eng-notifications@mozilla.com",
     source='{}/raw/{}/.taskcluster.yml'.format(REPO_URL, COMMIT),
diff --git a/automation/taskcluster/lib/tasks.py b/automation/taskcluster/lib/tasks.py
index 783b6137c..c091ffe29 100644
--- a/automation/taskcluster/lib/tasks.py
+++ b/automation/taskcluster/lib/tasks.py
@@ -18,12 +18,23 @@ _OFFICIAL_REPO_URL = 'https://github.com/mozilla-mobile/fenix'
 
 class TaskBuilder(object):
     def __init__(
-        self, task_id, repo_url, git_ref, commit, owner, source, scheduler_id, date_string,
-        tasks_priority='lowest', trust_level=1
+        self,
+        task_id,
+        repo_url,
+        git_ref,
+        short_head_branch,
+        commit,
+        owner,
+        source,
+        scheduler_id,
+        date_string,
+        tasks_priority='lowest',
+        trust_level=1
     ):
         self.task_id = task_id
         self.repo_url = repo_url
         self.git_ref = git_ref
+        self.short_head_branch = short_head_branch
         self.commit = commit
         self.owner = owner
         self.source = source
@@ -130,7 +141,7 @@ class TaskBuilder(object):
     def _craft_branch_routes(self, variant):
         routes = []
 
-        if self.repo_url == _OFFICIAL_REPO_URL and self.git_ref == 'refs/heads/master':
+        if self.repo_url == _OFFICIAL_REPO_URL and self.short_head_branch == 'master':
             architecture, build_type, product = \
                 _get_architecture_and_build_type_and_product_from_variant(variant)
             product = convert_camel_case_into_kebab_case(product)
@@ -138,17 +149,18 @@ class TaskBuilder(object):
 
             routes = [
                 'index.project.mobile.fenix.branch.{}.revision.{}.{}.{}'.format(
-                    self.git_ref, self.commit, product, postfix
+                    self.short_head_branch, self.commit, product, postfix
                 ),
                 'index.project.mobile.fenix.branch.{}.latest.{}.{}'.format(
-                    self.git_ref, product, postfix
+                    self.short_head_branch, product, postfix
                 ),
                 'index.project.mobile.fenix.branch.{}.pushdate.{}.{}.{}.revision.{}.{}.{}'.format(
-                    self.git_ref, self.date.year, self.date.month, self.date.day, self.commit,
-                    product, postfix
+                    self.short_head_branch, self.date.year, self.date.month, self.date.day,
+                    self.commit, product, postfix
                 ),
                 'index.project.mobile.fenix.branch.{}.pushdate.{}.{}.{}.latest.{}.{}'.format(
-                    self.git_ref. self.date.year, self.date.month, self.date.day, product, postfix
+                    self.short_head_branch. self.date.year, self.date.month, self.date.day,
+                    product, postfix
                 ),
             ]
         return routes