$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-IO-String.git /var/lib/mock/dist-oc9-build-71211-47532/root/chroot_tmpdir/scmroot/perl-IO-String
Cloning into '/var/lib/mock/dist-oc9-build-71211-47532/root/chroot_tmpdir/scmroot/perl-IO-String'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-IO-String
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f445311 import perl-IO-String-1.08-5.tl4