$ git clone -n https://gitee.com/guyvwang/fftw.git /var/lib/mock/dist-an23-build-253720-63535/root/chroot_tmpdir/scmroot/fftw
Cloning into '/var/lib/mock/dist-an23-build-253720-63535/root/chroot_tmpdir/scmroot/fftw'...
$ git reset --hard d40234e508a611a7d7c8501697131d66f615b6f0
HEAD is now at d40234e Optimise spec file