Not enough info
If he missed the first shot (asuming "last shot" did not mean only shot - I don't pretend to have a clue about FIBA rules and whether they even have a 1 shot foul), the motion may well be trying to get his concentration back. I might buy the "fake" if he had been shooting and making them earlier in the game without the motion, but it still stikes me as a stretch.
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