title: How to apply changes from old branch to master, if master now is broken?
body: <p>I have two branches - broken <code>master</code> and <code>normal_state</code> with an old working code.</p>
  
  <p>Master was broken by merge commit and other severals so, I can't revert those dozens of commits. I need apply my state from <code>normal_state</code> to <code>master</code>. And make it in the way where <code>normal_state</code> will be write above changes of <code>master</code>. How to do that?</p>