$ git clone -n https://gitee.com/wanghuan158/qemu.git /var/lib/mock/dist-an23-build-484828-74348/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-an23-build-484828-74348/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin 40e14642b3cbba98977c4fdc76380f6e69a581a3:KOJI_FETCH_HEAD
From https://gitee.com/wanghuan158/qemu
 * [new ref]         40e14642b3cbba98977c4fdc76380f6e69a581a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40e1464 Sync upstream changes