$ git clone -n https://src.fedoraproject.org/rpms/R-bit64.git /var/lib/mock/f31-build-76697-31442/root/chroot_tmpdir/scmroot/R-bit64
Cloning into '/var/lib/mock/f31-build-76697-31442/root/chroot_tmpdir/scmroot/R-bit64'...
$ git reset --hard 56b64a5ecdf0294b8f7c7d4950ee5fd086c3f1db
HEAD is now at 56b64a5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild