diff --git a/src/taskgraph/actions/util.py b/src/taskgraph/actions/util.py
index 13c0c1278..253896314 100644
--- a/src/taskgraph/actions/util.py
+++ b/src/taskgraph/actions/util.py
@@ -64,12 +64,19 @@ def fetch_action(task_id):
                     raise
                 logger.debug(f"No label-to-taskid.json found for {task_id}: {e}")
 
-        namespace = "{}.v2.{}.pushlog-id.{}.actions".format(
+        # for backwards compatibility, look up actions via pushlog-id
+        pushlog_namespace = "{}.v2.{}.pushlog-id.{}.actions".format(
             graph_config["trust-domain"],
             parameters["project"],
             parameters["pushlog_id"],
         )
-        for task_id in list_tasks(namespace):
+        # ... but also look by revision, since github doesn't have pushlog-id
+        rev_namespace = "{}.v2.{}.revision.{}.actions".format(
+            graph_config["trust-domain"],
+            parameters["project"],
+            parameters["head_rev"],
+        )
+        for task_id in set(list_tasks(pushlog_namespace) + list_tasks(rev_namespace)):
             fetches.append(e.submit(fetch_action, task_id))
 
         # Similarly for cron tasks..