Report of existing Branch

I would like to run the action on demand to generate an report of the actual version of the software, not only of a pullrequest always of the full package.json

I tried 
      head-ref: ${{ github.ref }}
      base-ref: ${{ github.event.repository.default_branch }}

but this did not really help, is there probably already a hidden flag that forces always to use the full package.json?

thx
