git worktree usage

EXAMPLES
You are in the middle of a refactoring session and your boss comes in and demands that you fix something immediately. You might typically use git-stash[1] to store your changes away temporarily, however, your working tree is in such a state of disarray (with new, moved, and removed files, and other bits and pieces strewn around) that you don’t want to risk disturbing any of it. Instead, you create a temporary linked working tree to make the emergency fix, remove it when done, and then resume your earlier refactoring session.

$ git worktree add -b emergency-fix ../temp master
$ pushd ../temp# ... hack hack hack ...
$ git commit -a -m 'emergency fix for boss'
$ popd
$ rm -rf ../temp
$ git worktree prune

https://git-scm.com/docs/git-worktree

install link:https://www.digitalocean.com/community/tutorials/how-to-install-git-on-ubuntu-12-04