$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-experimental.git /var/lib/mock/dist-oc9-build-60589-16463/root/chroot_tmpdir/scmroot/perl-experimental
Cloning into '/var/lib/mock/dist-oc9-build-60589-16463/root/chroot_tmpdir/scmroot/perl-experimental'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-experimental
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1dfec25 import perl-experimental-0.028-5.tl4