title: Chef: deploy rails from git subfolder
body: <p>I'm using Chef to deploy a rails server. I'm storing my code in a git repository, but it's not the only item in the repository, it's in a subfolder</p>
  
  <pre>
  repo/
   project-files/
   more-project-files/
   rails-app/
  </pre>
  
  <p>Chef's deploy seems great, but it doesn't allow me to deploy from the subfolder (at least natively)
  Is there a clever way of doing this, or am I stuck using `execute' to run the rake tasks myself?</p>