$ git clone -n https://gitee.com/wanghuan158/qemu.git /var/lib/mock/dist-an23-build-483963-74333/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-an23-build-483963-74333/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin df20af60d72483d651fe39ff096eee9dbbfbf670:KOJI_FETCH_HEAD
From https://gitee.com/wanghuan158/qemu
 * [new ref]         df20af60d72483d651fe39ff096eee9dbbfbf670 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df20af6 Sync upstream changes