$ git clone -n https://gitee.com/wenyuzifang/nss-altfiles.git /var/lib/mock/dist-an23-build-485559-74348/root/chroot_tmpdir/scmroot/nss-altfiles
Cloning into '/var/lib/mock/dist-an23-build-485559-74348/root/chroot_tmpdir/scmroot/nss-altfiles'...
$ git fetch origin dd35530a6d1965e7ececd7ff275acf89b57e7f70:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/nss-altfiles
 * [new ref]         dd35530a6d1965e7ececd7ff275acf89b57e7f70 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd35530 Update code from upstream