$ git clone -n https://gitee.com/src-opencloudos-rpms/jackson-bom.git /var/lib/mock/dist-oc9-build-41742-14591/root/chroot_tmpdir/scmroot/jackson-bom
Cloning into '/var/lib/mock/dist-oc9-build-41742-14591/root/chroot_tmpdir/scmroot/jackson-bom'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/jackson-bom
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b41ef86 import jackson-bom-2.14.2-2.tl4