You can check the Renegade outfit easily if you choose a female character when playing Fortnite Battle Royale.
A red renegade outfit
How to get
You can obtain it in the Item Shop. It was only introduced three times (most recent April 12th: https://twitter.com/FortniteDaily/status/984228842385571840)
Visit the Locker to use Renegade
Released on September 27th, 2017, February 29th, 2018, and April 12th, 2018