title: How do I add a subtree with recursive submodules?
body: <p>I added a Git subtree to an existing repository: </p>
  
  <pre><code>$ git subtree add --prefix etc/theos https://github.com/theos/theos.git master --squash
  </code></pre>
  
  <p>But, this repository is usually cloned with the <code>--recursive</code> flag and I'm noticing that some stuff in the repository that should be there isn't. I didn't see a <code>--recursive</code> flag for subtree.</p>
  
  <p>How can I get this to work?</p>