$ git clone -n https://gitee.com/src-opencloudos-rpms/libldb.git /var/lib/mock/dist-oc9-build-42280-14591/root/chroot_tmpdir/scmroot/libldb
Cloning into '/var/lib/mock/dist-oc9-build-42280-14591/root/chroot_tmpdir/scmroot/libldb'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libldb
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f7d03e import libldb-2.5.1-3.tl4