$ git clone -n https://src.fedoraproject.org/rpms/libpolyxmass.git /var/lib/mock/f31-build-59281-28556/root/chroot_tmpdir/scmroot/libpolyxmass
Cloning into '/var/lib/mock/f31-build-59281-28556/root/chroot_tmpdir/scmroot/libpolyxmass'...
$ git reset --hard 807d187898273d6c563e9da2f8ee3f075f2cf28d
HEAD is now at 807d187 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild