How to Remove Your Last Git Commit

Remove your last commit (if you haven’t pushed yet)

git reset --hard HEAD~1

To see changes that have been committed and their position in HEAD

git reflog 

And to undo your previous reset and advance the cursor to the reference immediately behind the current state

git reset --hard HEAD@{1}

If you have already pushed you can

git revert HEAD

which will reverse your last commit by creating a new commit

Repost

This post is inspired by
http://pupeno.com/blog/really-resetting-the-database/#comment-1179. But as my blog mostly serves as a reference for my future self, I’d like to reprint this little snippet of code here as well.

namespace :db do
  desc "Crush and burn the database"
  task :hard_reset => :environment do
    File.delete("db/schema.rb")
    Rake::Task["db:drop"].execute
    Rake::Task["db:create"].execute
    Rake::Task["db:migrate"].execute
    Rake::Task["db:seed"].execute
    if !Rails.env.test?
      Rake::Task["db:data"].execute
    end
  end

  desc "Generate sample data for developing"
  task :data => :environment do
    # Create the sample data in here
  end
end