diff --git a/.github/workflows/merge.yml b/.github/workflows/merge.yml
index e27c853..ebce437 100644
--- a/.github/workflows/merge.yml
+++ b/.github/workflows/merge.yml
@@ -11,9 +11,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: refs/heads/main
+          ref: ${{ github.event.pull_request.head.sha }}
           token: ${{ secrets.GITHUB_TOKEN }}
-          fetch-tags: true
+          # fetch-tags: true
           # fetch-depth: 0
       # - name: stinky but
       #   run: git sparse-checkout disable; git checkout origin/main
@@ -22,12 +22,7 @@ jobs:
       - name: shallow
         run: cat .git/shallow
       - name: deepen tree
-        run: |
-          depth=0
-          while ! git describe --tags main; do
-            depth=$((depth + 1))
-            git fetch --tags --recurse-submodules=no --depth $depth origin main
-          done
+        run: git fetch --shallow-since 2023-08-17 --tags --recurse-submodules=no
       - name: status
         run: git status
       - name: descibe