$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Devel-Symdump.git /var/lib/mock/dist-oc9-build-64005-16463/root/chroot_tmpdir/scmroot/perl-Devel-Symdump
Cloning into '/var/lib/mock/dist-oc9-build-64005-16463/root/chroot_tmpdir/scmroot/perl-Devel-Symdump'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Devel-Symdump
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8958021 import perl-Devel-Symdump-2.18-5.tl4