Got a weird query here:
I bought a bottle of homemade rosehip syrup at a country fair on sunday, opened it that day and it made a bit of a pop when I unscrewed the bottle, tasted fine tho, today it tastes fizzy so i assume its fermenting. is there anything I can do with it? I don't mind leaving it to ferment to see if I an get some sort of liqueur out of it

If anyone has any ideas i'd be grateful as I don't want it to go to waste!
Thanks!