$ git clone -n https://gitee.com/wency_cn/edk2.git /var/lib/mock/dist-an23-build-493769-74562/root/chroot_tmpdir/scmroot/edk2
Cloning into '/var/lib/mock/dist-an23-build-493769-74562/root/chroot_tmpdir/scmroot/edk2'...
$ git fetch origin 2efa3ee28d17408a406adc47bb37187f7e15b0c8:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/edk2
 * [new ref]         2efa3ee28d17408a406adc47bb37187f7e15b0c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2efa3ee Update code from upstream