FR: allow informing zoekt about fetch --force

[mdaniel]

I would suspect there are a non-trivial number of repos that do force pushes, including overwriting tags:

2024/10/05 17:34:27 command [git --git-dir /data/.sourcebot/repos/github.com/JetBrains/intellij-community.git fetch origin --prune] failed: exit status 1
 ! [rejected]                  idea/191.7141.44     -> idea/191.7141.44  (would clobber existing tag)

In those scenarios, what sourcebot believes is the tag will not square up with the upstream's idea of the tag

I actually checked their issue tracker and surprisingly there doesn't seem to be an issue for influencing that behavior. So in that way, it's great you have a fork

If you want me to try and open the issue with them, let me know