Can I unpopulate a Git submodule?

Question

Once I run

git update submodule

can I do anything to make it go back to the way it was before init and update?

Answer 1

If you changes were commited, then you should be able to check the reflog:

git reflog

Once you find the change set you lost you can merge it back in.

If your changes were not commited, then they cannot be recovered.