$ git clone -n https://gitee.com/src-opencloudos-rpms/java-diff-utils.git /var/lib/mock/dist-oc9-build-127798-77009/root/chroot_tmpdir/scmroot/java-diff-utils
Cloning into '/var/lib/mock/dist-oc9-build-127798-77009/root/chroot_tmpdir/scmroot/java-diff-utils'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/java-diff-utils
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8aa9294 import java-diff-utils-4.11-5.tl4