es. The hook
also supports symbolic reference updates.</p>
</div>
<div class="paragraph">
<p>The hook takes exactly one argument, which is the current state the
given reference transaction is in:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>"prepared": All reference updates have been queued to the
transaction and references were locked on disk.</p>
</li>
<li>
<p>"committed": The reference transaction was committed and all
references now have their respective new value.</p>
</li>
<li>
<p>"aborted": The refere