git discard all changes and pull from upstream
git
Solution
There are (at least) two things you can do here–you can reclone the remote repo, or you can `reset --hard` to the common ancestor and then do a pull, which will fast-forward to the latest commit on the remote master.
To be concrete, here's a simple extension of Nevik Rehnel's original answer:
git reset --hard origin/master
git pull origin master
NOTE: using `git reset --hard` will discard any uncommitted changes, and it can be easy to confuse yourself with this command if you're new to git, so make sure you have a sense of what it is going to do before proceeding.
Problem
How do I fetch upstream repo and make it replace master? I only have one branch on my repo, which is master, and I completely messed it up, so I basically need to start over from the upstream. I think init will do the job, but is there an easier way?