diff --git a/.github/workflows/automate_merge_message.yml b/.github/workflows/automate_merge_message.yml
index c376f7d0f3..9fed796aa5 100644
--- a/.github/workflows/automate_merge_message.yml
+++ b/.github/workflows/automate_merge_message.yml
@@ -27,8 +27,8 @@ jobs:
         with:
           ref: '${{ github.event.pull_request.merge_commit_sha }}'
 
-      - name: fetch base
-        run: git fetch --depth 1 origin ${{ github.event.pull_request.base.sha }}
+      - name: fetch head & base
+        run: git fetch --depth 1 origin ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }}
 
         # We avoid using the in-source script since this workflow has elevated permissions that we don't want to expose
       - name: Generate Message