$ git clone -n https://src.fedoraproject.org/rpms/kdesdk-kioslaves.git /var/lib/mock/f39-build-1540488-36475/root/chroot_tmpdir/scmroot/kdesdk-kioslaves
Cloning into '/var/lib/mock/f39-build-1540488-36475/root/chroot_tmpdir/scmroot/kdesdk-kioslaves'...
$ git fetch origin 6ef9737052fa19760a4648d559ac7c38f4dcd8cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdesdk-kioslaves
 * [new ref]         6ef9737052fa19760a4648d559ac7c38f4dcd8cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ef9737 23.08.2