I think it’s important to know that this program is for code developers, and the issue here is with a tool called git. Git is like file saving on steroids, because on top of saving a single file, you save many changes to files in git, add a comment for why you made those changes, and share your changes across dozens of files with other developers.
What this guy did was develop for many months after starting to use git, but he never actually committed the files. Then he asked for to reset everything back to the original state, something that I do multiple times a day, and it gave him a warning that original means original and you will lose everything. And he said do it anyways.
What exactly do you think discard means?