$ git clone -n https://src.fedoraproject.org/rpms/R-vctrs.git /var/lib/mock/f31-build-74275-31103/root/chroot_tmpdir/scmroot/R-vctrs
Cloning into '/var/lib/mock/f31-build-74275-31103/root/chroot_tmpdir/scmroot/R-vctrs'...
$ git reset --hard 3f998ee20d6f1127956276dc24193e7865716b0a
HEAD is now at 3f998ee - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild