$ git clone -n https://gitee.com/src-opencloudos-rpms/dnf.git /var/lib/mock/dist-oc9-build-59724-16463/root/chroot_tmpdir/scmroot/dnf
Cloning into '/var/lib/mock/dist-oc9-build-59724-16463/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 38a492e import dnf-4.15.1-4.tl4