$ git clone -n https://gitee.com/wency_cn/cereal.git /var/lib/mock/dist-an23-build-502482-74802/root/chroot_tmpdir/scmroot/cereal
Cloning into '/var/lib/mock/dist-an23-build-502482-74802/root/chroot_tmpdir/scmroot/cereal'...
$ git fetch origin 777c17aab7911cc32155edf7f1bba26d68420d10:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/cereal
 * [new ref]         777c17aab7911cc32155edf7f1bba26d68420d10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 777c17a Update code from upstream