Oh sorry. You probably have to be in their developer-network thing and be approved to look at the Engine depot (there’s nothing special about this, anyone can request access). If you were on a source build, you would already have that access, so it won’t help you right now I guess. If you ever switch it’s there though.
If you’re on a source build through your work and they’re getting the build through perforce, maybe there’s someone else on the team you can pass it to that already has a github setup to integrate the change.