Merge pull request #79 from haskell-github-trust/new-hackage-versions

Fix New-Hackage-Versions trailer extraction

Author: spencerjanssen

.github/workflows/ci.yml

@@ -46,6 +46,7 @@ jobs:
       - name: Extract New-Hackage-Versions git trailer from Renovate
         if: ${{ github.event_name == 'pull_request' }}
         run: |
+          git fetch origin ${{ github.event.pull_request.head.sha }}
           for constraint in $(git log "--format=%(trailers:key=New-Hackage-Versions,valueonly=true)" ${{ github.event.pull_request.head.sha }} -1)
           do
             echo "constraints: $constraint" >> cabal.project.local