counter
O-goshi countered by Utsuri-goshi
The changing hip throw is the counter that turns a hip attack into your own: absorb the entry by dropping lower than the attacker, lift them clear, and switch your hips beneath them as they come down. One throw becomes another in mid-air.
No demonstration linked yet, and this is one of the places footage helps most. Know a good one? Suggest a video.
Each technique's own page carries its full narration, key points and how to receive it; follow the links above.