fetch: non-conflicting tags aren't committed

Report: https://lore.kernel.org/all/CAB9xhmPcHnB2+i6WeA3doAinv7RAeGs04+n0fHLGToJq=UKUNw@mail.gmail.com

When fetching tags via git fetch --tags if there are conflicts, then the non-conflicted tags are not committed. This is a bug from introducing batched-updates in git-fetch.