title: How to exclude certain directories/files from git grep search
body: <p>Is there a way to exclude certain paths/directories/files when searching a git repository using <code>git grep</code>? Something similar to the <code>--exclude</code> option in the normal <code>grep</code> command?</p>
  
  <p>I need to use <code>git grep</code> because using <code>grep</code> directly runs too slowly on large git repositories. </p>