title: clone from a git repo and commit to a new repository
body: <p>I've created a skeleton theme for the Ghost blogging engine. And committed this to a github repo, I want to be able to clone this repo as a new theme.</p>
  
  <pre><code>$ cd ghost/content/themes
  git clone https://github.com/StyxOfDynamite/styx_ghost_theme.git new_theme_name
  
  $ ls -l
  new_theme_name
  </code></pre>
  
  <p>this successfully creates a new theme, a copy of the base theme, however I want to change this and commit the new changes to a different repository not overwrite the changes to the base template....</p>
  
  <p>How do I achieve this?</p>