$ git clone -n https://src.fedoraproject.org/rpms/libxshmfence.git /var/lib/mock/f31-build-47716-26963/root/chroot_tmpdir/scmroot/libxshmfence
Cloning into '/var/lib/mock/f31-build-47716-26963/root/chroot_tmpdir/scmroot/libxshmfence'...
$ git reset --hard 6dc920495d9fa968f8ed98cfed56639d02b595ef
HEAD is now at 6dc9204 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild