Facet by deliveryKey

Hi!
It would be nice to have --facet option to check if an item has deliveryKey, so you could export and re-import items with --publish flag. 
like "dc-cli content-item export [dir] --facet "deliveryKey: *"

Currently I've faced some issues while trying to clone the entire hub. Items have been correctly moved, but I couldn't publish them using cli tool.