You will need OpenIV for this.

 - Run OpenIV
 - Follow the path:
 > GTA V > x64v.rpf > models > cdimages > streamedpeds_players.rpf > player_zero
 - if you haven't already, turn on edit mode and drag the file out of the folder
provided and into the path showed above.

Enoy the shirt. Or don't. I love you.♡