Replace ../gecko
with path to your cinnabar gecko repo and da9da17db2c68140ad873d2701c3c05162ca8443
with your cinnabar sha
[positron]$ git log gecko/master --format="%h %ci" --max-count=1000 | grep "$(git -C ../gecko show -s --format=%ci da9da17db2c68140ad873d2701c3c05162ca8443)"