For some reason, people have been using https://github.com/felipec/git-remote-hg instead of this repo as the canonical source of git-remote-hg. For that reason it has accumulated issues and pull requests at a higher rate.
I'd argue that since @mnauw is the cannonical repo, and if it's even possible, the issues prs from @felipec should be transfered to https://github.com/mnauw/git-remote-hg