$ git clone -n https://gitee.com/opencloudos-stream/qemu.git /var/lib/mock/dist-ocs23-build-141138-9708/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-ocs23-build-141138-9708/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/qemu
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffb49a5 !17 upgrade to 8.2.2 Merge pull request !17 from cunshunxia/master