title: How to download file in git repo using nodejs?
body: <p>I want to download a file in git repo without clone it.<br>
  For example <code>lodash</code> git repo :</p>
  
  <p><a href="https://github.com/lodash/lodash/" rel="nofollow">https://github.com/lodash/lodash/</a></p>
  
  <p>in that git there is file <code>lodash.js</code>:</p>
  
  <p><a href="https://github.com/lodash/lodash/blob/master/lodash.js" rel="nofollow">https://github.com/lodash/lodash/blob/master/lodash.js</a></p>
  
  <p>I have try using <code>nodegit</code> but still need to clone all files first.</p>
  
  <p>How to download <code>lodash.js</code> file only in git repo using nodejs?</p>