title: Change GIT_AUTHOR_DATE/GIT_COMMITTER_DATE date of a specific previous commit on git
body: <p>As per <a href="https://stackoverflow.com/questions/454734/how-can-one-change-the-timestamp-of-an-old-commit-in-git">this post</a>, it is recommended to do:</p>
  
  <pre><code>git filter-branch --env-filter \
      'if [ $GIT_COMMIT = &lt;commit hash here&gt; ]
       then
           export GIT_AUTHOR_DATE="Fri Jan 2 21:38:53 2009 -0800"
           export GIT_COMMITTER_DATE="Sat May 19 01:01:01 2007 -0700"
       fi'
  </code></pre>
  
  <p>to change the <code>GIT_AUTHOR_DATE</code> and <code>GIT_COMMITTER_DATE</code> of a previous commit.</p>
  
  <p>Is there a way to do this targeting the exact branch/commit, so I don't have to filter through all my branches? This takes a while on one of my projects.</p>