I'd posit that in this case it's git's failing to pipe content from some random internet connection unfiltered to the terminal. The terminal doesn't know where

I'd posit that in this case it's git's failing to pipe content from some random internet connection unfiltered to the terminal. The terminal doesn't know where those control sequences come from. But anytime you interface with something external, you have to be prepared for hostile behavior or content that's out of spec. In this case it's git that interfaces with something external. Remember that any software can be hacked or abused.