$ git clone -n https://gitee.com/src-opencloudos-rpms/nss-altfiles.git /var/lib/mock/dist-oc9-build-70906-47485/root/chroot_tmpdir/scmroot/nss-altfiles
Cloning into '/var/lib/mock/dist-oc9-build-70906-47485/root/chroot_tmpdir/scmroot/nss-altfiles'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/nss-altfiles
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8955ac import nss-altfiles-2.23.0-1.tl4