$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ffi.git /var/lib/mock/f31-build-89273-32071/root/chroot_tmpdir/scmroot/rubygem-ffi
Cloning into '/var/lib/mock/f31-build-89273-32071/root/chroot_tmpdir/scmroot/rubygem-ffi'...
$ git reset --hard 02ea395ae330a56ef75cd2c95bbd1d67097defb7
HEAD is now at 02ea395 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild