How could I get individual patches for RedHat Linux kernel?

Hello,

I'm studying patch validity for RedHat Linux kernel.

I would like to know there is any way to get individual patches for RedHat Linux kernel. Since RedHat Linux kernel's SRPM sometimes provides us with just one patched tarball, so I could not cut out a patch from tarball easily.

And I supposed that some patches are back ported from the newer upstream version to older RedHat Linux kernel. If my suppose is right, I also can not use upstream patch by referencing same title.

I know RedHat offers "Red Hat Code Browser" to see individual patches, but it is not appropriate for kernel's scrap & build experiment.

Best regards.