Cannot update to a branch with a dash/hyphen in the name
Created originally on Bitbucket by HarshaThota
It looks like TortoiseHg does not allow you to update to a branch, if the name of the branch contains a dash and/or a hyphen. You will instead get an "Unknown revision..." error message.
Seems like may be related to issue #1313 (closed) (Cannot add files to repository prefixed with a dash)