title: Pull in changes to a new branch after doing git commit --amend
body: <p>At my job, I have the current commit workflow.</p>
  
  <p>I commit a change onto master, then submit for CR (code review).</p>
  
  <p>--EDIT-- NOTE, THE CODE REVIEW PROCESS DOESN'T INVOLVE A PUSH TO ORIGIN, I.E. I AM NOT REWRITING REMOTE HISTORY.  </p>
  
  <p>If I do changes to address the CR, I don't make a new commit but I instead use <code>git commit --amend</code> on the old commit on master.</p>
  
  <p>i.e.</p>
  
  <pre><code>master: A (out for CR) --\
  dev:                      \ -- B.
  
  make changes on A, so now my tree looks like this:
  
  master: A' (modified A created with commit --amend)
  dev: A -- B
  
  </code></pre>
  
  <p>What I want is an easy way to make it look like</p>
  
  <pre><code>master: A' --\
  dev:          \-- B
  </code></pre>
  
  <p>I continue to work on a feature on top of the old one by branching. I can't do a simple rebase because the --amend command deletes the old commit on master.</p>
  
  <p>Right now, what I'm doing is I'm rebasing master and then doing an interactive rebase to delete the old A from the history on dev. Is there a better way?</p>