title: Rebase-push cycles for git branches
body: <p>I'm currently using a github repository with a single branch, based of a master branch of another repository. The github branch is a backup of my work, and definitely not meant for pulling, and as such I'm comfortable with rewriting its history when rebasing from the master repository.</p>
  
  <p>My problem is that I want a clean history, and if histories diverge I can't do that. This happens if I do a push ( initial work ) + rebase - the second push is rejected.</p>
  
  <p>I have tried to delete the branch and then push, but this has the nasty side effect of doing a drop-create of the repo, which is slow.</p>
  
  <p>How should I approach this problem?</p>