$ git clone -n https://gitee.com/wanghuan158/qemu.git /var/lib/mock/dist-an23-build-468812-74027/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-an23-build-468812-74027/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin b9d9d1caef631737ada958c5d4227cacc15c9dd4:KOJI_FETCH_HEAD
From https://gitee.com/wanghuan158/qemu
 * [new ref]         b9d9d1caef631737ada958c5d4227cacc15c9dd4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9d9d1c Sync upstream changes