title: Pull a branch of a "podified" project on github
body: <p>I would like to pull a branch of a github project instead of the master. Somebody know how to do it without being obliged to fork the master and merge the branch with the master on my own  ?</p>
  
  <p>pod 'MagicalRecord', :git => 'https://github.com/nhenin/MagicalRecord.git'</p>