The Yee-Haw! skin is an Epic Fortnite outfit. Yee-Haw! was available via the Item Shop for 1500 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Yee-Haw! Skin Details
Giddy-up!
Fortnite Yee-Haw! Skin PNG Images
Here is the PNG images of Yee-Haw! below!