$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-generators.git /var/lib/mock/dist-oc9-build-71185-47530/root/chroot_tmpdir/scmroot/perl-generators
Cloning into '/var/lib/mock/dist-oc9-build-71185-47530/root/chroot_tmpdir/scmroot/perl-generators'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-generators
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fb3e54 import perl-generators-1.15-3.tl4