How to merge one current branch into multiple following branches at once?
<p><strong>Edit: Question is NOT merging multiple branches into current branch. Something that was already answered a couple times on Stackoverflow.</strong></p>

<p>I'm trying to find the best way to maintain a tutorial for a great but still changing technology (<a href="http://trailblazer.to" rel="noreferrer">Trailblazer</a>).</p>

<p>Following the awesome <a href="https://leanpub.com/trailblazer" rel="noreferrer">Trailblazer book</a>, I would like to offer the TRB community the easiest followable repo. </p>

<p>This is the <strong>Git-branch structure</strong> I created so far:</p>

<pre><code>master
  |
  + setup
    |
    + chapter-03-01
      |
      + chapter-03-02
        |
        + chapter-03-03
</code></pre>

<p>So my question is… Is it possible to make changes on <code>setup</code> and merge it to all following branches at once, and make changes for example on chapter-03-01 and merge it to successive branches at once as well?</p>