How to point github plugin to another repo other than itself?

[sudoFerraz]

Hello, first of all thanks for the work on sourcecred;

Quick question, is there a way to run a sourcecred instance pointing to another repo other than the instance itself?
e.g.:
Forked sourcecred-instance to xyz/sourcecred-instance, but want it to generate an instance of the repo xyz/example-repo instead of watching the commits and PRs with the github plugin of xyz/sourcecred-instance