You probably know this, but for others that don't: local git clones will share storage space with hardlinks for the objects in .git. The wasted space wouldn't be a doubling, it would be the work tree twice plus the (small) non-hardlinked bits under .git. No idea how LFS interacts with this, but it can be worth knowing about this mechanism.

Also, if you end up relying on it for space reasons, worth knowing that cloning from a file:// url switches the hardlink mechanism off so you end up with a full duplicate again.