/em></dt>
<dd>
<p>A symbolic ref name.  E.g. <em>master</em> typically means the commit
object referenced by <em>refs/heads/master</em>.  If you
happen to have both <em>heads/master</em> and <em>tags/master</em>, you can
explicitly say <em>heads/master</em> to tell Git which one you mean.
When ambiguous, a <em>&lt;refname&gt;</em> is disambiguated by taking the
first match in the following rules:</p>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>If <em>$GIT_DIR/&lt;refname&gt;</em> exist