$ git clone -n https://gitee.com/src-opencloudos-rpms/SDL2.git /var/lib/mock/dist-oc9-build-71987-47622/root/chroot_tmpdir/scmroot/SDL2
Cloning into '/var/lib/mock/dist-oc9-build-71987-47622/root/chroot_tmpdir/scmroot/SDL2'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/SDL2
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba0fb2b import SDL2-2.28.2-3.tl4