$ git clone -n https://gitee.com/src-opencloudos-rpms/fmt.git /var/lib/mock/dist-oc9-build-41176-14591/root/chroot_tmpdir/scmroot/fmt
Cloning into '/var/lib/mock/dist-oc9-build-41176-14591/root/chroot_tmpdir/scmroot/fmt'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/fmt
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9875271 import fmt-9.1.0-3.tl4