Reported by Unknown User, Mar 23, 2010

(This entry was imported from the savannah tracker, original 
location: https://savannah.nongnu.org/bugs/index.php?29310)

After using mtn merge_into_workspace, I've sometimes decided that I 
dislike the merges I've (not) made and that I'd like to start over. 
However, once one has a multi-parent workspace, it appears to be 
impossible to escape. I cannot use revert or update to change my 
workspace to something else, as both commands require a single 
parent workspace. Instead, I'm forced to delete my workspace and 
perform a new checkout.