Fixed via https://bugzilla.redhat.com/show_bug.cgi?id=1867597#c9

verified with MTC 1.3.0
$ oc get pod -n nginx-example stage-nginx-deployment-557dd97bf8-clwvp-qfr87 -o yaml | grep image
    openshift.io/restore-registry-hostname: image-registry.openshift-image-registry.svc:5000
            f:image: {}
            f:imagePullPolicy: {}
        f:imagePullSecrets:
            f:image: {}
            f:imagePullPolicy: {}
    image: quay-enterprise-quay-enterprise.apps.cam-tgt-8380.qe.devcluster.openshift.com/admin/openshift-migration-velero-restic-restore-helper-rhel8@sha256:24e3d1a721e737e61bc0b05e318295c43f568c251cc78e2d1087d4b6263c8b50
    imagePullPolicy: IfNotPresent
  imagePullSecrets:
    image: quay-enterprise-quay-enterprise.apps.cam-tgt-8380.qe.devcluster.openshift.com/admin/openshift-migration-velero-restic-restore-helper-rhel8@sha256:24e3d1a721e737e61bc0b05e318295c43f568c251cc78e2d1087d4b6263c8b50
    imagePullPolicy: IfNotPresent

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Migration Toolkit for Containers (MTC) Tool image release advisory 1.3.0), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4148