Make sure that we checkout on the right branch

.github/workflows/trigger-benchmarks-on-message.yml

@@ -27,6 +27,16 @@ jobs:
           reaction-type: "eyes"
           repo-token: ${{ env.GH_TOKEN }}
 
+      - uses: xt0rted/pull-request-comment-branch@v2
+        id: comment-branch
+        with:
+          repo_token: ${{ env.GH_TOKEN }}
+
+      - uses: actions/checkout@v3
+        if: success()
+        with:
+          ref: ${{ steps.comment-branch.outputs.head_ref }}
+
       # Set variables
       - name: Set current branch name
         shell: bash