$ git clone -n https://src.fedoraproject.org/rpms/sddm-kcm.git /var/lib/mock/f40-build-804872-144637/root/chroot_tmpdir/scmroot/sddm-kcm
Cloning into '/var/lib/mock/f40-build-804872-144637/root/chroot_tmpdir/scmroot/sddm-kcm'...
$ git fetch origin ec806af7271315d25d5fdd7d32676941c3ec815a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sddm-kcm
 * [new ref]         ec806af7271315d25d5fdd7d32676941c3ec815a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec806af 6.0.3