Shall I get HELOC for the down payment?

[Nina Ning]

I just refi'ed my primary residency in August, now I want to buy a new construction that will be ready for move in in Fed,2021. I don't have enough down payment so I'm thinking to refi my primary again to cash out for the down payment. Since I 'll have to wait another 6 months to refi again, for the time being , shall I get a HELOC for the down payment and then pay it back once I refi ?

Thanks 

Nina