Modify access rules
diff --git a/project.config b/project.config
index 571935f..7be2214 100644
--- a/project.config
+++ b/project.config
@@ -2,3 +2,5 @@
 	inheritFrom = chromiumos
 [project]
 	description = Parent for chromiumos/overlays/* projects, defines common ACLs.
+[access "refs/for/refs/*"]
+	exclusiveGroupPermissions = pushMerge