* "Pit bull" is not a recognized breed: The term "pit bull" is often used colloquially to refer to several breeds, including the American Pit Bull Terrier, the American Staffordshire Terrier, and the Staffordshire Bull Terrier.
* "Sorrell" is a color: Sorrel is a color, not a breed. It describes a reddish-brown coat with varying shades and tones.
So, what you're likely referring to is a dog of one of the pit bull-type breeds with a sorrel coat.
To be more specific, you could say:
* Sorrel American Pit Bull Terrier
* Sorrel American Staffordshire Terrier
* Sorrel Staffordshire Bull Terrier
Keep in mind that the term "pit bull" can be controversial and can be associated with negative stereotypes. It's important to use accurate breed names when talking about these dogs.