The Sabbat-aligned thing you are looking for is the Fire Dance. Allows you to look at the fire peacefully once you pass a Rotschreck check successfully during the ritual (difficulty 5 -- very low) and successfully jump over the fire. By the system it gives you one more Courage die for 3 nights, as we played it, it gave a total immunity to Rotschreck.
What goes to the means of surviving touching the fire... That's a lot harder. Fortitude would help, but you need a crazy amount of it to resist fire (especially strong fire) reliably: 8 dots to soak being fully submerged in fire with soak difficulty of 6, and 5 dots if half of your body is submerged. Given that Fortitude is an out-of-clan Discipline for the Tremere, it's too much.
However, if you are Tremere, you could have Auspex 5 (Astral Projection) and, once you beat Rotschreck, watch fire from the astral world without any fear of being burned. Even if you fail the check to resist Rotschreck, you are still alive.
You could also use Dominate 5 (Possession) on your ghoul and watch the fire. If he/she dies -- make a new one, just 3 nights to make the full Blood Bond.
P.S. Also, if you are Tremere in modern nights... How are you going to get Sabbat abilities?