title: fatal: clean.requireForce defaults to true and neither -i, -n, nor -f given; refusing to clean
body: <p>When I am trying to clean all untracked files by <code>git clean</code> it shows me the error: </p>
  
  <pre><code>fatal: clean.requireForce defaults to true and neither -i, -n, nor -f given; refusing to clean
  </code></pre>
  
  <p>How to resolve it?</p>