[gary_bernhardt]

Whoa, you're right! He referenced it neither by 7-character short hash nor by full hash, and I didn't think to check intermediate hash lengths. I've updated the post to reference that email.

[auscompgeek]

The kernel devs recommend using 12-character commit hash abbreviations: https://www.kernel.org/doc/html/latest/process/submitting-pa... (bottom of the section has a git config snippet)