How can I undo a `git commit` locally and on a remote after `git push`

I have performed git commit followed by a git push. How can I revert that change on both local and remote repositories?

$ git log
commit 364705c23011b0fc6a7ca2d80c86cef4a7c4db7ac8
Author: Michael Silver <Michael [email protected]>
Date:   Tue Jun 11 12:24:23 2011 -0700