diff --git a/pagure/hooks/pagure_no_new_branches.py b/pagure/hooks/pagure_no_new_branches.py
index 69d51cf..052044b 100644
--- a/pagure/hooks/pagure_no_new_branches.py
+++ b/pagure/hooks/pagure_no_new_branches.py
@@ -65,6 +65,10 @@ class PagureNoNewBranchRunner(BaseRunner):
         For args, see BaseRunner.runhook.
         """
 
+        if repotype != "main":
+            print("The no new branches hook only runs on the main git repo.")
+            return
+
         for refname in changes:
             (oldrev, newrev) = changes[refname]