Find out why a git-ubuntu package repository is not up-to-date
https://git.launchpad.net/ubuntu/+source/<package>to see when git-ubuntu last updated the package repository.
https://launchpad.net/ubuntu/+source/<package>/+publishinghistoryto see when the package was last updated by Launchpad.
Ask an admin if it’s pending or errored in the queue.
If there are no other signs, then developer debug is probably necessary.