Sure you can, but until its rooted, it won't change anything. 12 hours or 24 hours, it is not trying to flower, its trying to root.
Just wait till its a certified clone, not cutting, and then just go 12/12. My point is simply that there is no need to veg it at all. But when trying to root. Makes no sense not to just keep the light on 24/0. Creates a much more stable environment during the rooting period.