RAT 5
That's probably the same on most, if not all commercial jet aircraft, including the B777. However, doing 'circuits' is one thing, recovering from a baulked landing is quite another. In the case of the latter, keeping landing flap is preferable as it's unplanned and the priority is to get the aircraft airborne again. This is in effect an undesired state whereas a touch and go is a stable approach and landing, with a planned ground flap retraction and trim. The config warning will be present, on the ground, but the flap can be selected to the G/A setting once safely established in the climb. Higher than usual control forces may be required as the aircraft is trimmed for landing, not take off.
Then can begin the sequence of a 'normal' go around. Hope that clarifies?
Harry