Mercurial test repository

You can update repository as "bare repository" with following command.
$ hg update null

And please see following links.
* http://mercurial.selenic.com/wiki/GitConcepts#Bare_repositories
* http://mercurial.selenic.com/wiki/Update
* http://mercurial.selenic.com/wiki/Parent
* http://mercurial.selenic.com/wiki/WorkingDirectory

