$ git clone -n https://src.fedoraproject.org/rpms/plasma-discover.git /var/lib/mock/f42-build-3442770-45457/root/chroot_tmpdir/scmroot/plasma-discover
Cloning into '/var/lib/mock/f42-build-3442770-45457/root/chroot_tmpdir/scmroot/plasma-discover'...
$ git fetch origin 6189c813426d0d306fea92799c0f4dad28cce56c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-discover
 * [new ref]         6189c813426d0d306fea92799c0f4dad28cce56c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6189c81 Require kf6-kitemmodels and kf6-purpose