I assume you already know this, i.e. the above was sarcasm, but: No, it can't. But since remote access to Git most commonly happens over SSH, ACLs can be implem

I assume you already know this, i.e. the above was sarcasm, but: No, it can't. But since remote access to Git most commonly happens over SSH, ACLs can be implemented by additional tools which serve as the login shell and filter the git commands the client wants to run. The best such tool right now is gitolite, building on concepts established by gitosis. The GitHub-like open source web repo manager Gitorious also implements an ACL system that way.