SHELL

git reset to commit

# reset to specefic commit
git reset --hard <commit id>

# to go back one step 
git reset --hard HEAD~1

# note: use --soft to keep file changes

git reset initial commit

git update-ref -d HEAD

reset to commit

# rollback to commit state
git revert --no-commit 0766c053..HEAD
git commit

reset to commit

# This will detach your HEAD, that is, leave you with no branch checked out:
git checkout 0d1d7fc32