$ git clone -n https://src.fedoraproject.org/rpms/xorg-x11-drv-dummy.git /var/lib/mock/f31-build-101545-33409/root/chroot_tmpdir/scmroot/xorg-x11-drv-dummy
Cloning into '/var/lib/mock/f31-build-101545-33409/root/chroot_tmpdir/scmroot/xorg-x11-drv-dummy'...
$ git reset --hard 8b8c38be5aafa06f08d1aad2571a140cd782eb55
HEAD is now at 8b8c38b - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild