Given the following situation:

• You're on feature/* branch and you have your latest changes already pushed to origin
• Now, you want to rebase your feature/* branch with the latest master
• You type in git rebase master from your feature/* branch
• You fix all conflicts and finish the rebase
• OH SHIT SOMETHING'S WRONG I NEED TO UNDO IT BUT HOW?

Okay, take a deep breath and just calm down. Use the following to reset it to your latest origin.

$~ git reset --hard ORIG_HEAD

That's it. This will only work if you haven't push your changes to origin yet. If you have, then you need to use git reflog