hg-git release 1.0.1 appears to the first release they claim to support Mercurial 6.2, updating this package to that release seems like a likely fix.
https://foss.heptapod.net/mercurial/hg-git/-/tags/1.0.1 Thanks!
- Bug#1026409: mercurial-git currently broken in testing Christopher Jones
- Bug#1026409: Christopher Jones
