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-rw-r--r--.github/workflows/post-merge.yml5
1 files changed, 5 insertions, 0 deletions
diff --git a/.github/workflows/post-merge.yml b/.github/workflows/post-merge.yml
index 919e1bb3320..2bc06d83c5b 100644
--- a/.github/workflows/post-merge.yml
+++ b/.github/workflows/post-merge.yml
@@ -16,6 +16,11 @@ jobs:
       pull-requests: write
     steps:
       - uses: actions/checkout@v4
+        with:
+          # Make sure that we have enough commits to find the parent merge commit.
+          # Since all merges should be through merge commits, fetching two commits
+          # should be enough to get the parent bors merge commit.
+          fetch-depth: 2
       - name: Perform analysis and send PR
         env:
           GH_TOKEN: ${{ github.token }}