$ git clone -n https://gitee.com/src-opencloudos-rpms/man-db.git /var/lib/mock/dist-oc9-build-42904-14591/root/chroot_tmpdir/scmroot/man-db
Cloning into '/var/lib/mock/dist-oc9-build-42904-14591/root/chroot_tmpdir/scmroot/man-db'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/man-db
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a372070 import man-db-2.10.2-3.tl4