[qabqabaca]

Sourcegraph[1] does this better and has done for a couple of years now. I use it for this reason all the time.

[1] https://sourcegraph.com

[Arnavion]

Yes, just change the URL from https://github.com/foo/bar to https://sourcegraph.com/github.com/foo/bar to be dropped in to a code search for that GH repo.