Answer by cansu for Undoing a git rebase

Somehow git reset does not give desired cleanup result on my branch. For such cases if you don't push rebase commits to your branch, I have a guaranteed way of resetting my branch and here are the steps :

1. Switch another branch (any of them)
2. Delete branch(you want to reset) from your local with this command :

git delete -B [branch-name]

3. checkout to existing branch again :

git checkout [branch-name]