$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f40-build-788824-135430/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f40-build-788824-135430/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin d16b44886ffc2b51046d78c76bdf6361066fbfd8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         d16b44886ffc2b51046d78c76bdf6361066fbfd8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d16b448 6.0.0