$ git clone -n https://gitee.com/src-opencloudos-rpms/gtkmm30.git /var/lib/mock/dist-oc9-build-70020-47377/root/chroot_tmpdir/scmroot/gtkmm30
Cloning into '/var/lib/mock/dist-oc9-build-70020-47377/root/chroot_tmpdir/scmroot/gtkmm30'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gtkmm30
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 212935b import gtkmm30-3.24.7-4.tl4