Hi I haven't had tortoises long but as far as I know you don't have to hibernate any tortoise, I won't ever hibernate my marginated would be to worrying!! With my marginated I use coco fibre which works well with him but doesn't with my sulcata. Marginated do like to dig mine sleeps half buried in it hide, hope this helps
If you have the room indoors for a more or less permanent tortoise habitat, and are able to keep a tortoise warm through the winter, and if you WANT to keep your tortoise awake, then there is no reason for him to hibernate. It is strictly up to you. There is one school of thought that a tortoise must hibernate to be healthy. In my opinion, this is not so.
Personally, I like for my hibernating species to hibernate. It gives me a break from the daily routine.
Marginateds can be brumated (hibernated) in captivity, but do not have to be. They are not a burrowing species like Russians which are the only true burrowing species of the Testudo genus.