How to make a git branch be based off of a different branch from what it was originally branched off from
An easy thing to do covered confusingly in 2-dozen other blog posts around the web. But not here my friend.
March 27, 2015
git checkout branch-you-are-working-on
git rebase --onto branch-you-want-it-based-on branch-it-is-based-on
John Bachir's Code Blog