$ git clone -n https://src.fedoraproject.org/rpms/xorg-x11-server.git /var/lib/mock/f31-build-71509-30650/root/chroot_tmpdir/scmroot/xorg-x11-server
Cloning into '/var/lib/mock/f31-build-71509-30650/root/chroot_tmpdir/scmroot/xorg-x11-server'...
$ git reset --hard cf7f90e3c6a4101c5b228a1f9e123f4a6e8a9a97
HEAD is now at cf7f90e - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild