$ git clone -n https://src.fedoraproject.org/rpms/lua-ldap.git /var/lib/mock/f42-build-59143059-6571252/root/chroot_tmpdir/scmroot/lua-ldap
Cloning into '/var/lib/mock/f42-build-59143059-6571252/root/chroot_tmpdir/scmroot/lua-ldap'...
$ git fetch origin 42a373469995ea462bcceb6d531a4e2f3e127b07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lua-ldap
 * [new ref]         42a373469995ea462bcceb6d531a4e2f3e127b07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42a3734 Update to latest upstream