title: What is the format of <pattern> in git-branch --list
body: <p>As title, I have read <a href="http://www.kernel.org/pub/software/scm/git/docs/git-branch.html" rel="noreferrer">the manual</a> but in vain.</p>
  
  <p>What I found is that a <code>*</code> can be wildcard pattern matching.</p>
  
  <pre><code>git branch --list 'issues*6'
   issues/586
   issues/616
  </code></pre>
  
  <p>However, it's found by myself instead of mentioned in manual page.</p>
  
  <p>I wonder what is the real format of <code>&lt;pattern&gt;</code>.</p>