$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-DBI.git /var/lib/mock/dist-oc9-build-71113-47517/root/chroot_tmpdir/scmroot/perl-DBI
Cloning into '/var/lib/mock/dist-oc9-build-71113-47517/root/chroot_tmpdir/scmroot/perl-DBI'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-DBI
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfbede4 import perl-DBI-1.643-5.tl4