Another try

.github/workflows/ci.yml

@@ -23,6 +23,7 @@ jobs:
       - name: Install
         run: |
           echo ${GITHUB_REF##*/}
+          echo ${{ github.event.pull_request.base.ref }} 
           chezmoi init https://github.com/marchdf/dotfiles.git --branch ${GITHUB_REF##*/} --promptString email="" --promptBool use_zsh_root_dir=false
           chezmoi data
           # chezmoi apply -v