title: How to make a git repository read-only?
body: <p>I have some git repositories accessed remotely through SSH and I want to make some of them read-only to prevent more pushes. Some people have remotes pointing to these repositories.</p>
  
  <p>These bare repositories were initialised <code>--shared=group</code>, so is setting file permissions to 660 for all files good enough to still allow SSH access, but disallow writes? Or is there an easier way?</p>
  
  <p>Cheers.</p>