Serve bare git repo from a remote server?

Hello, firstly - thanks for the amazing repo.

I understand that in your implementation (and stackdot's), you use `git-upload-pack` and `git-receive-pack` processes to allow the client and server to talk to each other (figure out what packets the other needs, etc.) To my knowledge, this git command accepts a local directory, but what if I host all my bare git repositories on a separate server, like an AWS S3 bucket? Could I stream a remote bare repo to these git commands, that then stream the necessary packets to the client? I don't want to host all my bare git repos on my heroku instance, since the storage is ephemeral and limited. Any guidance would be appreciated!