You can try that - deleting your local jetson-containers repo will not delete the containers, those are stored separately by your docker daemon. You can then re-clone jetson-containers repo and see if the SD models re-appear under data/ after you run the SD container again. I’m not sure why it would continually re-download them unless there is an issue with the mounting…
You can also start the container to run bash instead of stable-diffusion-webui, then you can poke around inside the container and get a better idea of what mounted files it sees:
./run.sh $(./autotag stable-diffusion-webui) /bin/bash