Here's the full situation:
The commit below is my last commit ever made.
commit 2d1efd9c58b44542f81ccba6e33eb698665e7fec Author: Jeramae Bohol <mr.jeramaebohol@gmail.com> Date: Thu May 12 07:00:14 2016 +0000 Add account activations
Then after that commit, I made a big mistake deleting the wrong migration file but the good thing is I haven't commit this yet.
My question is, how can I checkout to my last commit and ignore/delete this one that I made a mistake?