we use ubuntu as example：
open the ubuntu docker hub, https://hub.docker.com/_/ubuntu
# with the right sha256, can works, suffix with 20 docker pull ubuntu:jammy@sha256:b060fffe8e1561c9c3e6dea6db487b900100fc26830b9ea2ec966c151ab4c020 # without the right sha256, cannot works, suffix with 21 docker pull ubuntu:jammy@sha256:b060fffe8e1561c9c3e6dea6db487b900100fc26830b9ea2ec966c151ab4c021
check the docker image
REF:
https://stackoverflow.com/questions/25445318/docker-how-do-i-pull-a-specific-build-id
https://stackoverflow.com/questions/32046334/where-can-i-find-the-sha256-code-of-a-docker-image