title: How to change the files in particualr git commits back in history?
body: <p>A file <code>hello.world</code> is added in <strong>commit A</strong>, and modified in <strong>commit B</strong> and <strong>commit C</strong>.</p>
  <p>Now I want to add a file to all three commits (could be the same filename with <code>hello.world</code>.<strong>removed appended</strong>) and it contains a message explaining that <code>hello.world</code> was removed from the history as part of repo cleanup, and ideally state the checksum of the <code>hello.world</code> at the given commit.</p>
  <p>Is it possible to do so? How do I do it?</p>