$ git clone -n https://src.fedoraproject.org/rpms/R-XVector.git /var/lib/mock/f31-build-49861-27357/root/chroot_tmpdir/scmroot/R-XVector
Cloning into '/var/lib/mock/f31-build-49861-27357/root/chroot_tmpdir/scmroot/R-XVector'...
$ git reset --hard 718d7d29de806233fb89acea09afc7363443039b
HEAD is now at 718d7d2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild