nightpool

/* ==UserStyle==
@name           github tab size
@namespace      nightpool.club
@version        1.0.0
@description    smaller tabs on github!
@author         nightpool
==/UserStyle== */

@-moz-document domain("github.com") {
  .tab-size[data-tab-size="8"] {

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this: