Nothing with a word order like "Whose shirt is that?" (that would be... "Czyja koszula jest to?" - perhaps not exactly wrong, but really unusual.
You can use the dummy pronoun "to" and create a sentence which I would translate to "Whose shirt is [this/that/it]?" - that would be "Czyja to koszula?" or "Czyja to jest koszula?". And I think it's a more natural sentence than this one here, unless you want to specify "THAT shirt" as if you contrasted it with some other shirt.