The Mercurial Update action updates the repository's working directroy to the specified changeset. Update is usually run after actions such as Pull, which update the repository metadata but not the files in the working directory.
Update is also useful for reverting the working directory to a previous revision.
The revision to update to. It none is specified, the working directory is updated to the head of the current branch.
Update to the tipmost revision matching the date. See Date Formats for more information.
Discard any uncommitted changes.
Check for uncommitted changes.