title: Git local mirror
body: <p>I have a remote git repository with big history and slow connection channel. Where are some local users, and slow push/pull after big commits or cloning from scratch for new users are big problems, now. I want to create local mirror of it. Local changes must be committed to local repo, and sync with remote in background. I understand that this problem is in demand, but I have not found any solution yet (I am not admin of remote repo, I just try to simplify local work with it). </p>