diff --git a/.github/workflows/seo-report.yaml b/.github/workflows/seo-report.yaml
index 03e92b8..4291c41 100644
--- a/.github/workflows/seo-report.yaml
+++ b/.github/workflows/seo-report.yaml
@@ -34,12 +34,11 @@ jobs:
       - name: Get Deployment Source Branch Name
         id: git-branch
         run: |
-           git branch -a --contains ${{ github.event.deployment.ref }}
-           source_branches="$(git branch -a --contains ${{ github.event.deployment.ref }})"
-           result=$(echo "$source_branches" | tail -n1 | sed 's/^[ \t]*//')
-           echo "Remote source of deployment: ${result}"
-           echo "Local git ref of deployment: ${result#remotes/origin/*}"
-           echo "SOURCE_REF=${result#remotes/origin/*}" >> "$GITHUB_OUTPUT"
+          branch=$(curl -s -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
+          "https://api.github.com/repos/${{ github.repository }}/deployments/${{ github.event.deployment.id }}" \
+          | jq -r '.ref' | cut -d "/" -f 3-)
+          echo "Source branch of deployment: $branch"
+          echo "SOURCE_REF=$branch" >> "$GITHUB_ENV"
 
       - name: Build Unlighthouse report
         run: |