diff --git a/.github/workflows/validate-queries.yml b/.github/workflows/validate-queries.yml
index 1280ac2b..97bf870f 100644
--- a/.github/workflows/validate-queries.yml
+++ b/.github/workflows/validate-queries.yml
@@ -50,12 +50,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
         with:
-          ref: "refs/pull/${{ github.event.number }}/merge"
+          ref: "${{ github.event.pull_request.head.sha }}"
           fetch-depth: 2
 
       - name: Sanity Check
         run: |
-          [[ "$(git rev-parse 'HEAD^2')" == "${{ github.event.pull_request.head.sha }}" ]]
+          [[ "$(git rev-parse 'HEAD')" == "${{ github.event.pull_request.head.sha }}" ]] || exit 1
 
       - name: Azure login (OIDC)
         uses: azure/login@a65d910e8af852a8061c627c456678983e180302 # v2.2.0