$ git clone -n https://gitee.com/src-opencloudos-rpms/libdb.git /var/lib/mock/dist-oc9-build-46708-14592/root/chroot_tmpdir/scmroot/libdb
Cloning into '/var/lib/mock/dist-oc9-build-46708-14592/root/chroot_tmpdir/scmroot/libdb'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libdb
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31e58b5 import libdb-5.3.28-3.tl4