It's in the plans to shut down git.xservers.dy.fi in the future so it's probably not going to exist for much longer.
The reason for this is after having taken better look at the build requirements to compile forgejo from source it turns out there is huge list of dependencies (a.k.a third party libraries) forgejo depends on which can be seen as big security threat since all it would take is one of those big amounts of dependencies to be taken over and malicious update pushed for wide spread of malware. Forgejo simply cannot be trusted for that reason, even if forgejo is fully secure the dependencies pose huge risks.