$ git clone -n https://src.fedoraproject.org/rpms/dbus-broker.git /var/lib/mock/f39-build-1489374-34501/root/chroot_tmpdir/scmroot/dbus-broker
Cloning into '/var/lib/mock/f39-build-1489374-34501/root/chroot_tmpdir/scmroot/dbus-broker'...
$ git fetch origin 691f0757d1360cfdc05efc5a785d60fcd9a10139:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dbus-broker
 * [new ref]         691f0757d1360cfdc05efc5a785d60fcd9a10139 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 691f075 dbus-broker: Backport selinux permissive support