$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-namespace-clean.git /var/lib/mock/dist-oc9-build-71275-47537/root/chroot_tmpdir/scmroot/perl-namespace-clean
Cloning into '/var/lib/mock/dist-oc9-build-71275-47537/root/chroot_tmpdir/scmroot/perl-namespace-clean'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-namespace-clean
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51b9280 import perl-namespace-clean-0.27-5.tl4