Imported: Better handling of force pushs

[DaGeRe]

This issue has been imported from an old repository. It was originally created by @Schattensilber at 2021-09-24T08:38:43Z with number #41

Currently it is not clear what's going on after a force push.
Since peass can't build the 'last' (deleted) version it just doesn't do anything but doesn't show an error message either.
It should be made clear to the user that something is up. Clearing the peass-cache and rebuilding seems to fix the issue.