It's pretty hard to get it for free , but you can obtain it by drops or trade up ( I think if you trade up anodized pearl you will get more chance of it , I got the fennec by trading it once).

if you get the goop animated decal out of a crate, you can trade 5 of them to get the chance of a fennec or painted fennec

free fennec is hard to get man ive played the game for over 3 years and a month and have only gotten two and those were one on my switch account and one on my playstation account and havent gotten one since ^^

I either have to get it out a crate or buy it I think it’s in the item shop rn

Im sry but it’s not that simple