$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-DB_File.git /var/lib/mock/dist-oc9-build-62639-16463/root/chroot_tmpdir/scmroot/perl-DB_File
Cloning into '/var/lib/mock/dist-oc9-build-62639-16463/root/chroot_tmpdir/scmroot/perl-DB_File'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-DB_File
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b82cb9 import perl-DB_File-1.858-5.tl4