$ git clone -n https://src.fedoraproject.org/rpms/SuperLU.git /var/lib/mock/f42-build-864842-172600/root/chroot_tmpdir/scmroot/SuperLU
Cloning into '/var/lib/mock/f42-build-864842-172600/root/chroot_tmpdir/scmroot/SuperLU'...
$ git fetch origin cc58ea5cc9e215e04add4e7b7bf75e6743fc5996:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/SuperLU
 * [new ref]         cc58ea5cc9e215e04add4e7b7bf75e6743fc5996 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc58ea5 Release 7.0.0