Per details from cloned bugs, PR https://github.com/openshift/jenkins/pull/853 updated the upstream master branch (which is currently for 4.2)
The osbs/brew jobs are not ready yet, working with ART.
The created Kubernetes Pod Template using the ConfigMap style will not removed more than a dozen hours.
Verified with jenkins image registry.svc.ci.openshift.org/ocp/4.2-2019-05-27-211046@sha256:f2d60cfc24ce881c4def3bc3bc4b1c8ab5fd031508c12b3a6bd85f1dbb52081a(get from 4.2.0-0.ci-2019-05-27-211046 payload)
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, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.