title: update git version in docker container
body: <p>I am implementing a node.js application in docker, that needs to make use of the git worktree feature. However, even if I do :</p>
  
  <pre><code>RUN apt-get update &amp;&amp; apt-get install -y git=2.10.0
  </code></pre>
  
  <p>it can't find any other version after 2.1.0</p>
  
  <p>I am building the image from :</p>
  
  <pre><code>FROM node:4.4.2 
  </code></pre>
  
  <p>How can I get the latest git version that supports the worktree feature installed on a docker container </p>