Jumping off from Olivio Sarikas' example of using MeshGraphormer Hand Refiner, but using a hires input image. You will need a SD1.5 model to use the controlnet, but the image can be larger since you are just inpainting. I did not get good results with the automatic inpaint mask, and manually painted my own. As Olivio noted the hands are featureless after the fix, but an upscale can add this back. Not losing the hands again may take some tweaking. I used ultimate SD upscale with a low CFG and a tile size that did not place the hands on a seam.