If you have a repo cloned locally and hosted on the remote, then you have the repo saved to two different places (although possibly without all the refs locally but you likely have your main/dev/etc branch at least).
What I've been wanting to do once I get my NAS working again is host the repos on that instead. You can make a mirror of a repository very easily, so if you want to mirror a GitHub repo onto another service or a NAS or something (or the other way around, NAS -> GH for example), it's really only a couple commands to fully back it up, and you could just put that in a cron job or hook.