$ git clone -n https://gitee.com/wenyuzifang/nss-altfiles.git /var/lib/mock/dist-an23-build-469452-74027/root/chroot_tmpdir/scmroot/nss-altfiles
Cloning into '/var/lib/mock/dist-an23-build-469452-74027/root/chroot_tmpdir/scmroot/nss-altfiles'...
$ git fetch origin 74dd24fd0342403acc50e4b37c2bb99c22e8e076:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/nss-altfiles
 * [new ref]         74dd24fd0342403acc50e4b37c2bb99c22e8e076 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74dd24f Update code from upstream