$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-namespace-autoclean.git /var/lib/mock/dist-oc9-build-44000-14591/root/chroot_tmpdir/scmroot/perl-namespace-autoclean
Cloning into '/var/lib/mock/dist-oc9-build-44000-14591/root/chroot_tmpdir/scmroot/perl-namespace-autoclean'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-namespace-autoclean
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70d6d77 import perl-namespace-autoclean-0.29-3.tl4