$ git clone -n https://gitee.com/wenyuzifang/fftw.git /var/lib/mock/dist-an23-build-480538-74252/root/chroot_tmpdir/scmroot/fftw
Cloning into '/var/lib/mock/dist-an23-build-480538-74252/root/chroot_tmpdir/scmroot/fftw'...
$ git fetch origin a1df8937967fe572d8407ccedec412f6e9d93c36:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/fftw
 * [new ref]         a1df8937967fe572d8407ccedec412f6e9d93c36 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1df893 Update code from upstream