Copy each `commit_message` from source folder's git history

[vencho-mdp]

Hi! I know this package has a commit_message option. But I'd like to have that option set automatically based on each commit on the src repo. AFAIK, this could be a little bit tricky to implement since I think this action just copies all the content in the src repository to the destination repo, without taking into account each commit's message content.

[dobbelina]

@vencho-mdp
This does exactly what you want:
commit_message: ${{ github.event.head_commit.message }}