Fetching zipball from a tag gets master instead

[garak]

I'm trying to fetch zipball from jquery 2.1.3
If I do this:

<?php
$client = new Github\Client();
$file = $client->api('repo')->contents()->archive('jquery', 'jquery', 'zipball', '2.1.3');

I get zipball from master.
I debugged with Guzzle, and I see that file it's retrieved from https://api.github.com/repos/jquery/jquery/zipball?ref=2.1.3
According to docs, it should be retrieved from https://api.github.com/repos/jquery/jquery/zipball/2.1.3

See Bee-Lab/bowerphp#111