$ git clone -n https://gitee.com/wanghuan158/qemu.git /var/lib/mock/dist-an23-build-484883-74348/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-an23-build-484883-74348/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin b186aa4a889449e3af51671895ebde4caffe6d22:KOJI_FETCH_HEAD
From https://gitee.com/wanghuan158/qemu
 * [new ref]         b186aa4a889449e3af51671895ebde4caffe6d22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b186aa4 Sync upstream changes