it would take forever to reveg that, you wouldn't want to chop all the bud off it either, youd just wait for new shoots to pop out from the top and start growing foliage again. Your lookin at a few weeks to regain growth and this can be done if you are adamant about this and have the time/patience necessary to complete this alteration and playing god, so to speak, with the natural rythums of natures pulse. Be sure to leave alot of root exposed after slicing on a 45 degree angle, like scrape away some green up the stem where you cut, leaving more exposed for roots to emerge. Use superthrive within your cloning cubes and your rooting dome. It'll be a game of waiting and daily monitoring/adjusting.
I sure hope you already have experience in cloning or this could be pointless, never know, good luck
~ BCbuddy