title: How to show progress for submodule fetching?
body: <p>I know I can tell Git to show progress like</p>
  
  <pre><code>Resolving deltas:  98% (123/125)  
  </code></pre>
  
  <p>when passing the command line parameter <code>--progress</code> to, e.g. the fetch command. But we have a couple of large submodules and there no progress is shown. How to tell Git to also show progress for cloning submodules (e.g. as part of the fetch command)?</p>