$ git clone -n https://gitee.com/fundawang/tengine.git /var/lib/mock/dist-an23-build-296900-65802/root/chroot_tmpdir/scmroot/tengine
Cloning into '/var/lib/mock/dist-an23-build-296900-65802/root/chroot_tmpdir/scmroot/tengine'...
$ git fetch origin 684135c4e9ae5373b9cd2455768629b64da66ed3:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/tengine
 * [new ref]         684135c4e9ae5373b9cd2455768629b64da66ed3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 684135c use pwd