$ git clone -n https://gitee.com/wanghuan158/qemu.git /var/lib/mock/dist-an23-build-538577-83799/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-an23-build-538577-83799/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin 8c1dff090909ee705d012983109bf565d11085c6:KOJI_FETCH_HEAD
From https://gitee.com/wanghuan158/qemu
 * [new ref]         8c1dff090909ee705d012983109bf565d11085c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c1dff0 Sync upstream changes