title: Nested Git repositories?
body: <p>Can I nest Git repositories? I have:</p>
  
  <pre><code> /project_root/
   /project_root/my_project
   /project_root/third_party_git_repository_used_by_my_project
  </code></pre>
  
  <p>Does it make sense to <code>git init/add</code> the <code>/project_root</code> to ease management of everything locally or do I have to manage <code>my_project</code> and the 3rd party one separately?</p>