$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Exception-Class.git /var/lib/mock/dist-oc9-build-43569-14591/root/chroot_tmpdir/scmroot/perl-Exception-Class
Cloning into '/var/lib/mock/dist-oc9-build-43569-14591/root/chroot_tmpdir/scmroot/perl-Exception-Class'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Exception-Class
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9a5afb import perl-Exception-Class-1.45-3.tl4