I also have a self hosted Foregejo on a Pi (but probably not much longer) that acts as a mirror of my GitHub. The main issues I keep facing are:

- Repositories seem to mirror fine for a few weeks and stop. Pretty useless. I have a PAT token for it that does not expire, and yet it seems to claim otherwise, despite the token working elsewhere when I test it.

- Sometimes there is nothing in the logs, sometimes it's the database being locked for some reason. The only thing that uses the database is Forgejo.

- So far I haven't been able to tell if this is Forgejo, crappy SD IO on the Pi causing database locks, or Forgejo sucking at being a mirror.