$ git clone -n https://gitee.com/wency_cn/at_1770960308.git /var/lib/mock/dist-an23-build-514436-75110/root/chroot_tmpdir/scmroot/at_1770960308
Cloning into '/var/lib/mock/dist-an23-build-514436-75110/root/chroot_tmpdir/scmroot/at_1770960308'...
$ git fetch origin 909cb1f977ee63a6031dde5d2a27c519b4017d11:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/at_1770960308
 * [new ref]         909cb1f977ee63a6031dde5d2a27c519b4017d11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 909cb1f Update code from upstream