What is the それ in それゆけ? As I understand it, is an interjection that might be translated "Go!" or "Go get 'em!" While the second component is clearly , what is the intended sense of here?

here is an interjection (). It's like .

says:

>
> ****

The pronoun (for "that") is []{LH}. The interjection is []{HL}.