There is an easy way to commit changes from an unlock state?

[microhobby]

What I'm doing is rsyncing the root / filesystem ignoring the system folders, and then committing it. But this does not look very smart, since the overlay fs knows what changed, it would be good to me not need to copy everything to only tell the ref that the rest was not deleted. Or I do not know a way to tell ostree to commit only the changes and leave untouched the rest of the ref. There is a way? Thanks in advance!