The Mercurial repository will be publicly edited on Wednesday 07 November evening.
I've discovered that the tag 2.2.0 and its signature commit were created on the wrong branch and this requires manual history edition. This means that you should either download a fresh copy of the repository or to strip and update.
Warning: if you have local changesets, those will be removed.
# you need strip extension hg strip -r 0 hg pull hg up @