title: Undoing a git bisect mistake
body: <p>I'm doing a non-automated git bisect via command line. All is going well until I accidentally hit return on the wrong line in my command history, and rather than running the test, I run 'git bisect good' (or bad). Oops - I don't yet know if this commit should be marked good or bad, yet that's what I've done. </p>
  
  <p>Can I undo the 'git bisect good' command, or make git forget the result of it, and go back and run the test for that commit?</p>