The purpose of hg2git is to convert a Mercurial repository to a Git repository. All mechanism of conversion is based on fast-export tool.
docker run -it -v ~/anyproject-hg:/work/projectname -v ~/project-result-git:/work/result lroche/hg2git projectname
or if you don't want to specifiy projectname:
docker run -it -v ~/anyproject-hg:/work/project -v ~/project-result-git:/work/result lroche/hg2git
the run uses two bound volumes, one for hg source, other for git target result. the name of project has no matter but it will be the same between /work/projectname and the argument of the command (here projectname)
The result of git conversion can be found behind the /work/result volume