$ git clone -n https://src.fedoraproject.org/rpms/plasma-print-manager.git /var/lib/mock/f42-build-side-1-3506316-45996/root/chroot_tmpdir/scmroot/plasma-print-manager
Cloning into '/var/lib/mock/f42-build-side-1-3506316-45996/root/chroot_tmpdir/scmroot/plasma-print-manager'...
$ git fetch origin 7276736803f8792a3aa4613a1847d2a992887f52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-print-manager
 * [new ref]         7276736803f8792a3aa4613a1847d2a992887f52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7276736 6.3.4