John, it has nothing to do with whether you're importing from GitHub; it depends on whether the repository's history contains commits with gpgsig tags.
Our plan for this remains as I outlined in comment 24, although some other urgent bits of work have jumped the queue and delayed us implementing it. A workaround for the time being might be to occasionally push the git repository to Launchpad's own git hosting manually.
John, it has nothing to do with whether you're importing from GitHub; it depends on whether the repository's history contains commits with gpgsig tags.
Our plan for this remains as I outlined in comment 24, although some other urgent bits of work have jumped the queue and delayed us implementing it. A workaround for the time being might be to occasionally push the git repository to Launchpad's own git hosting manually.