You have to have someone else reset for you while you are offline. You can either have someone who hasn’t been inside the instance do it for you, or you can have someone help you group up with an alt, and wait online on that alt (who hasn’t been inside the instance) until leadership of the group is automatically transferred. If you have a second account you can just promote your alt before logging off.
It works for most zg trash (can’t remember if the jin’do trash is linked to the boss), but in most 40 man raids trash won’t respawn once certain bosses are dead.