http://nkuz2tpok7ctwd5ueer5bytj3bm42vp7lgjcsnznal3stotg6vyaakyd.onion/rbm_config.html
If this option is set, git_hash should be
set to select the commit to use. hg_url The URL of a mercurial repository that will be cloned and used
to create the tarball. If this option is set, hg_hash should
be set to select the commit to use. git_hash A git hash, branch name or tag.