Just to be absolutely clear, the spell Hex--as has been pointed out before in this thread--does not require chicken shenanigans to maintain over multiple target for the duration of the spell. The text of the spell states that the caster "can use a bonus action on a subsequent turn of yours to curse a new creature."
Notice it does not say next turn. So you can cast in the first battle of the day, knock the target down to 0 hp, take a short rest and gain the spell slot back, then move the hex to a new target in the next battle as long as concentration is maintained and the duration has not expired.
Notice it does not say next turn. So you can cast in the first battle of the day, knock the target down to 0 hp, take a short rest and gain the spell slot back, then move the hex to a new target in the next battle as long as concentration is maintained and the duration has not expired.