title: how to update one submodule git?
body: <p>I have a couple of submodules and I only want to update one of them.</p>
  
  <p>I think this command updates all of them in <code>.gitmodules</code></p>
  
  <pre><code>git submodule update --init --recursive --remote
  </code></pre>
  
  <p>I just want one of the modules updated though.</p>