get_head_commit_message.yaml

#runs-on: windows-latest
#  steps:   
#    - uses: actions/checkout@v3.5.2 # https://github.com/marketplace/actions/checkout
- name: Get Head Commit Message
  id: get_head_commit
  shell: pwsh
  run: |
    $Message = git log --format=%B -n 1 HEAD
    Write-Output "title=$($Message | Select -First 1)" >> $Env:GITHUB_OUTPUT
    Write-Output "body=$($Message | Select -Skip 1)" >> $Env:GITHUB_OUTPUT