Could you also check for/remove any instances of truncating the revision to 12 characters? We prefer the full 40 characters.
eg:
https://github.com/mozilla/mozmill-ci/blob/e0f6a97f66fc015c20f164096836ea7d0139abe4/jenkins-master/jobs/trigger-ondemand/workspace/trigger.py#L85
https://github.com/mozilla/mozmill-ci/blob/e0f6a97f66fc015c20f164096836ea7d0139abe4/jenkins-master/jobs/trigger-ondemand/workspace/trigger.py#L178
https://github.com/mozilla/mozmill-ci/blob/6a4372c0e78ab491a466d2c5284b67b6f1a59e90/jenkins-master/jobs/scripts/workspace/submission.py#L322
https://github.com/mozilla/mozmill-ci/blob/bc7538268a80a254bb28f7cbd748bc30c95ef68a/lib/automation.py#L265
As mentioned by @edmorley on PR #842: