title: Running filter-branch over a range of commits
body: <pre><code>git filter-branch --env-filter '
  export GIT_AUTHOR_EMAIL="foo@example.com"
  export GIT_AUTHOR_NAME="foo"' -- commita..commitb
  </code></pre>
  
  <p>Results in <code>Which ref do you want to rewrite?</code></p>
  
  <p>So it seems that <code>filter-branch</code> doesn't allow you to <s>use range notation</s> use a range between two arbitrary refs.</p>
  
  <p>What is the most straight forward way of running a filter over a range of consecutive commits (somewhere within the history of a branch) if this approach isn't possible.</p>