div>
<div class="paragraph">
<p>Both standard output and standard error output are forwarded to
<code>git send-pack</code> on the other end, so you can simply <code>echo</code> messages
for the user.</p>
</div>
</div>
<div class="sect2">
<h3 id="_reference_transaction">reference-transaction</h3>
<div class="paragraph">
<p>This hook is invoked by any Git command that performs reference
updates. It executes whenever a reference transaction is prepared,
committed or aborted and may thus get called multiple tim