devel/hg-git: fix when using with mercurial >= 3.3.3

PR: 199262
Submitted by: Quentin Schwerkolt <schwer_q.lists@outlook.com>
Approved by: Marco Bröder <marco.broeder@posteo.eu> (maintainer)
Obtained from: https://github.com/schacon/hg-git/commit/6331251