migrate_extrinsic_metadata: Filter out git revisions
They can't have any extrinsic metadata, so fetching git revisions wastes a lot of time.
Migrated from D5390 (view on Phabricator)
Staging instance, all changes can be removed at any time
They can't have any extrinsic metadata, so fetching git revisions wastes a lot of time.
Migrated from D5390 (view on Phabricator)