$ git clone -n https://gitee.com/opencloudos-stream/dnf.git /var/lib/mock/dist-ocs23-build-31073-1233/root/chroot_tmpdir/scmroot/dnf
Cloning into '/var/lib/mock/dist-ocs23-build-31073-1233/root/chroot_tmpdir/scmroot/dnf'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/dnf
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42c13db !2 Upgrade to upstream version 4.15.1 Merge pull request !2 from jackxjchen/master