$ git clone -n https://src.fedoraproject.org/rpms/plasma5support.git /var/lib/mock/f40-build-2526498-61812/root/chroot_tmpdir/scmroot/plasma5support
Cloning into '/var/lib/mock/f40-build-2526498-61812/root/chroot_tmpdir/scmroot/plasma5support'...
$ git fetch origin 6fe66aabf70d2b2d18e28e5fcda6d9f8fdb93dac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma5support
 * [new ref]         6fe66aabf70d2b2d18e28e5fcda6d9f8fdb93dac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fe66aa 6.0.1