In the first hulk-out scene you can clearly see the split boots, but when David unhulks David is wearing boots
While Nat operates the bulldozer, he is wearing a jacket in some shots; in others he is not.
David is wearing a pair of jeans without a red tag above the right rear pocket. After David falls down the hill in a close up you can see that the the jeans he is wearing has a red tag above the right rear pocket. After David hulks out the Hulk is no longer wearing the same pair of jeans as you cannot see the red tag above the pocket. And his belt is gone again without any reason.
Don't know where David got his blue jeans because the scarecrow was wearing a brown pair of pants and no belt.