$ git clone -n https://gitee.com/wency_cn/tuna_1772069474.git /var/lib/mock/dist-an23-build-515104-75118/root/chroot_tmpdir/scmroot/tuna_1772069474
Cloning into '/var/lib/mock/dist-an23-build-515104-75118/root/chroot_tmpdir/scmroot/tuna_1772069474'...
$ git fetch origin a952c86bd1873a8918665c4f00fb6f27e32f7ce8:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/tuna_1772069474
 * [new ref]         a952c86bd1873a8918665c4f00fb6f27e32f7ce8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a952c86 Update code from upstream