$ git clone -n https://gitee.com/src-opencloudos-rpms/dnf.git /var/lib/mock/dist-oc9-build-40984-14591/root/chroot_tmpdir/scmroot/dnf
Cloning into '/var/lib/mock/dist-oc9-build-40984-14591/root/chroot_tmpdir/scmroot/dnf'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/dnf
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0008ed0 import dnf-4.12.0-3.tl4