Comment 3 for bug 1999177

> The repository is huge and pushing a copy to my own namespace just for sponsoring is dire.

Did you try it? I'm under the impression that it should be quick due to being a hardlink based clone on the Launchpad end.

The plan in the bug description is:

> prepare-upload could do this by fetching/updating the remote ref and checking that the HEAD commit is reachable from it.

Would that have been acceptable to you in this use case?