For more information on reverting merges, refer to the following articles:
- The How To Revert a Faulty Merge article at https://www.kernel.org/pub/software/scm/git/docs/howto/revert-a-faulty-merge.html
- The Undoing Merges article at http://git-scm.com/blog/2010/03/02/undoing-merges.html