Today our tests at GitHub and BitBar uses our GitHub mirrors but we could switch to use Gerrit, that way we can avoid things like T328735 in the future:
https://gerrit.wikimedia.org/g/performance/mobile-synthetic-monitoring-tests
https://gerrit.wikimedia.org/g/performance/synthetic-monitoring-tests

There some parts here: The URL in BitBar is in the zip file, so it is a little bit complicated to switch + I think our AWS machines have a closed firewall, so this is something we can fix together with one new team member.