Undo several commits in git which have not pushed to remote [duplicate]

Question

I have run git status and

# On branch master
# Your branch is ahead of 'origin/master' by 4 commits.
#   (use "git push" to publish your local commits)
#
# Changes not staged for commit:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   app/views/layouts/_header.html.erb
#
no changes added to commit (use "git add" and/or "git commit -a")

I want undo all the 4 commits and changes not staged for commit before commiting to my remote repository. How can i do this?

Answer 1

You can also run the following to reset to the remote's HEAD:

git reset --hard <REMOTE>/<BRANCH_NAME>

Ex:

git reset --hard origin/master

Answer 2

This will throw away all local changes in the working tree and the four latest commits:

git reset --hard HEAD~4