$ git clone -n https://gitee.com/wenyuzifang/fftw.git /var/lib/mock/dist-an23-build-485099-74348/root/chroot_tmpdir/scmroot/fftw
Cloning into '/var/lib/mock/dist-an23-build-485099-74348/root/chroot_tmpdir/scmroot/fftw'...
$ git fetch origin 8b837fe071ee6324c8b26dde55c8718350cdcaf5:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/fftw
 * [new ref]         8b837fe071ee6324c8b26dde55c8718350cdcaf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b837fe Update code from upstream