Currently the closest we have is a template in the PR guide document,
for reviewers to send to contributors. However, it doesn't cover rebasing,
which is probably the most important part.
See https://comaps.zulipchat.com/#narrow/channel/496493-Code-Repo/topic/Developer.20Certificate.20of.20Origin.20.28DCO.29/with/604559042
Currently the closest we have is a template in the PR guide document,
for reviewers to send to contributors. However, it doesn't cover rebasing,
which is probably the most important part.