Allow removal of clone after push

[hobti01]

This is a nice tool but unfortunately we have some disk constraints when mirroring many repositories. Many of them use LFS and we run out of disk space during a mirroring of just a few repos.

We are running within a container and not persisting the directories in any case.

Unfortunately, I'm not confident enough in Rust to submit a pull request, but it would be great to have a flag to delete each checked out repository after push is complete.

[bachp]

I think that should be quite easy to implement.

Would a globale command line switch be ok or do you need to control this per repo?

[hobti01]

We would be happy with a global option that removed after each repo. Thanks for the timely response