A corner jig for a masonry saw for fabricating a cut in a masonry unit (e.g., brick) such as to form a corner brick veneer may have a push block wherein its height is substantially equal to a length of a brick to be formed into the corner brick veneer. A lateral position of a cut guide is adjustable to regulate a thickness of the corner brick veneer. A height of the cut guide may also be substantially equal in length of the bring to be formed into the corner brick veneer. Once the cut guide and push block are mounted to the masonry saw, the brick is positioned within the corner jig and a first cut is made. The user's hands are out of the way so that the cut can be made safely without harming the operator. The brick is repositioned and a second cut is made in the brick to finish off the corner brick veneer. Once again, the user's hands are out of the way for safe operation of the masonry saw. Moreover, no subsequent cuts or finishing step are required to provide for a clean square interior corner of the corner brick veneer.