|git-annex-required(1)||General Commands Manual||git-annex-required(1)|
git annex required . "include=*.mp3 or include=*.ogg"
Without an expression, displays the current required content setting of the repository.
While git-annex-wanted(1) is just a preference, this designates content that should really not be removed. For example a file that is wanted can be removed with git annex drop, but if that file is required, it would need to be removed with git annex drop --force.
Also, git-annex fsck will warn about required contents that are not present.