title: GIT: Can't checkout out branch
body: <p>Quick question. A colleague has pushed a branch using sourcetree and named it <code>task/something/something_else</code></p>
  
  <p>Using git in a bash shell, I've done <code>git fetch</code> but am unable to check it out. I get the following error:</p>
  
  <p><code>error: pathspec 'task/something/something_else' did not match any file(s) known to git.</code></p>
  
  <p>How can I fix this?</p>