$ git clone -n https://src.fedoraproject.org/rpms/cxxtools.git /var/lib/mock/f33-build-521812-64576/root/chroot_tmpdir/scmroot/cxxtools
Cloning into '/var/lib/mock/f33-build-521812-64576/root/chroot_tmpdir/scmroot/cxxtools'...
$ git reset --hard 9fecad871760b0082174c2877df7a79b48ba5b1f
HEAD is now at 9fecad8 Re-enable LTO