"Y via X" would be preferable. It's worth keeping in mind that what GitHub does now is what _every_ other git client does, and it's in GitHub's best interest n

"Y via X" would be preferable. It's worth keeping in mind that what GitHub does now is what _every_ other git client does, and it's in GitHub's best interest not to confuse users (or to make it look like they're privileging a GitHub-based workflow over a standard git workflow).