title: Move differences of two branches into a third branch
body: <p>I acidentally branched off my organisations 'staging' branch. I've merged my changes into staging from the feature branched I previously branched off staging with so its now in staging.</p>
  
  <p>They now want it in develop, I can't merge the feature branch into develop as staging and develop are way different. What's the easiest way? Faster the better, atm I'm copy + pasting.</p>