$ git clone -n https://gitee.com/opencloudos-stream/ghc-libBF.git /var/lib/mock/dist-oc9-epol-build-221166-80935/root/chroot_tmpdir/scmroot/ghc-libBF
Cloning into '/var/lib/mock/dist-oc9-epol-build-221166-80935/root/chroot_tmpdir/scmroot/ghc-libBF'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ghc-libBF
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3490b2e !3 Rebuilt Merge pull request !3 from epol/master