Absolutely, it would preserve the original B. You can easily switch your working...

		mrb on Jan 20, 2012 \| parent \| context \| favorite \| on: The Real Difference Between Git and Mercurial Absolutely, it would preserve the original B. You can easily switch your working directory to one of them: hg update B or B' You can easily throw away the one you don't want to keep: hg strip B or B'