Have you ever been on a situation when there are some unecessary untracked files on your repository? Probably yes. It would be easy to just perform an rm to delete a single untracked file or rm -rf ./unwanted_dir to remove a directory plus it's content. However, this could take time when there are a lot that needs to be remove.

That's where git clean comes in handy. By default it would remove only the untracked the files. Passing it the -d flag also removes the untracked the directory. Another useful flag is the -i which lets you enter in an interactive clean prompt which will let you confirm removal of the files/directories:

sh $ git clean -d -i

So, save some time by using git clean!