$ git clone -n https://gitee.com/src-opencloudos-rpms/xerces-j2.git /var/lib/mock/dist-oc9-build-45546-14591/root/chroot_tmpdir/scmroot/xerces-j2
Cloning into '/var/lib/mock/dist-oc9-build-45546-14591/root/chroot_tmpdir/scmroot/xerces-j2'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xerces-j2
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ea8dc6 import xerces-j2-2.12.2-2.tl4