$ git clone -n https://src.fedoraproject.org/rpms/sddm-kcm.git /var/lib/mock/f42-build-side-1-3573375-46767/root/chroot_tmpdir/scmroot/sddm-kcm
Cloning into '/var/lib/mock/f42-build-side-1-3573375-46767/root/chroot_tmpdir/scmroot/sddm-kcm'...
$ git fetch origin fb28f8f2cdb5dde5e4b5f2fc7bb467b29e994428:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sddm-kcm
 * [new ref]         fb28f8f2cdb5dde5e4b5f2fc7bb467b29e994428 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb28f8f 6.4.0