$ git clone -n https://src.fedoraproject.org/rpms/llvm3.9.git /var/lib/mock/f31-build-91250-32303/root/chroot_tmpdir/scmroot/llvm3.9
Cloning into '/var/lib/mock/f31-build-91250-32303/root/chroot_tmpdir/scmroot/llvm3.9'...
$ git reset --hard fa459030f5845f7c07360782f6fdf2712919cb95
HEAD is now at fa45903 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild