When repairing items, the circular indicator thingy in the center of the UI plays an additional time after maximum repair state has already been reached (e.g. repairing your shoes from "damaged" to "worn" makes the circle spin twice).

This appears to happen with all clothing items except for the "improvised" ones crafted using rags.

The item used for repair does not seem to lose some of its "percentage left" due to this, e.g. you can have a sewing kit with two repairs left in it (50%), using it to repair a shirt from "damaged" to "worn" will yield two full revolutions of the circle but still leave 25% remaining in the sewing kit.