$ git clone -n https://gitee.com/rabbitali/fftw.git /var/lib/mock/dist-an23-build-490531-74493/root/chroot_tmpdir/scmroot/fftw
Cloning into '/var/lib/mock/dist-an23-build-490531-74493/root/chroot_tmpdir/scmroot/fftw'...
$ git fetch origin 9cdea3bbc74d7eab0aa5914175140de3a399375c:KOJI_FETCH_HEAD
From https://gitee.com/rabbitali/fftw
 * [new ref]         9cdea3bbc74d7eab0aa5914175140de3a399375c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cdea3b Update code from upstream