title: Bundle issue when installin gem from github
body: <p>I have issue with installing gems from Github on Docker. Windows 10 pro. </p>
  
  <p>Gemfile:</p>
  
  <pre><code>gem 'kaminari', git: 'https://github.com/kaminari/kaminari', branch: 'master'
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>     Git error: command `git clone --no-checkout --quiet
      "/bundle_box/cache/bundler/git/kaminari-afd5cc7513de17a7e5e6421480370a0b7ec57040"
      "/bbox/bundler/gems/kaminari-27a0c850b50a"` in directory /App has failed.
      If this error persists you could try removing the cache directory
      '/box/cache/bundler/
      git/kaminari-afd5cc7513de17a7e5e6421480370a0b7ec57040'
  </code></pre>
  
  <p>I try removing this cache directory. But every time same error</p>