Due to both revisions being included in the same push it's impossible to just backfill 9b74bcc1a5a10a584162ef5124e8cd1bffb7c17d, as far as I am aware.
Bug 1927103 Comment 4 Edit History
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Due to both revisions being included in the same push it's impossible to just backfill 9b74bcc1a5a10a584162ef5124e8cd1bffb7c17d, as far as I am aware. We can only retrigger jobs from a push, not choose a particular revision from the push.