Applying Patches
This is specifically for applying patches from a .patch or a .mbox, which is a less ideal way especially if patches has landed in some git trees.
Easiest way is to use b4:
b4 shazam ${LINK_FROM_LORE_KERNEL_ORG}
For example:
b4 shazam 20250613-for-upstream-not-instantiate-spd5118-v2-1-cf456ed9b587@canonical.com
Another way would be downloading the .mbox from a mailing list thread and use git am.