diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 44570cd..f7a9a08 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -157,6 +157,9 @@ jobs:
       # Check out the current repository
       - name: Fetch Sources
         uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}  # to check out the actual pull request commit, not the merge commit
+          fetch-depth: 0  # a full history is required for pull request analysis
 
       # Set up Java environment for the next steps
       - name: Setup Java