$ git clone -n https://gitee.com/src-opencloudos-rpms/dnf /var/lib/mock/dist-oc8-build-57867-15781/root/chroot_tmpdir/scmroot/dnf
Cloning into '/var/lib/mock/dist-oc8-build-57867-15781/root/chroot_tmpdir/scmroot/dnf'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/dnf
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5746193 import dnf-4.7.0-19.tl3