If you're interested in HK's kernel patches, you can simply download their repository (`git clone https://github.com/hardkernel/linux.git`), then add the upstream kernel repository (`git remote add upstream git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable`), then fetch it and just compare the tags (e.g. `git cherry -v vX.Y.Z X.Y.Z-A`).
