Running the git stash command will take all the changes to tracked files
in the working directory and stash them away. You can tack on the
--include-untracked flag to make sure that untracked files are also
included in the stash.
You can take this a step further with the --all flag. This will stash
everything included files that you've told git to ignore.
You probably don't want to do this. I ran this command and realized after
the command hung for about 10 seconds that I had just stashed the
node_modules directory.
See man git-stash for more details.