title: How do I merge multiple branches into master?
body: <pre><code>        C---D  =&gt;b1
        /    
       /  E---F  =&gt;b2
       | /   
    A--B =======&gt; master
       | \
       \  G---H  =&gt;b3
        \ 
         I---J   =&gt;b4
  </code></pre>
  
  <p>I want to merge <code>b1</code>,<code>b2</code>,<code>b3</code>,<code>b4</code> into <code>master</code>, is it possible merge at once?</p>
  
  <p>something like:</p>
  
  <pre><code>git checkout master
  git merge b1 b2 b3 b4
  </code></pre>