$ git clone -n https://gitee.com/opencloudos-stream/ghc-generic-deriving.git /var/lib/mock/dist-oc9-epol-build-215071-80822/root/chroot_tmpdir/scmroot/ghc-generic-deriving
Cloning into '/var/lib/mock/dist-oc9-epol-build-215071-80822/root/chroot_tmpdir/scmroot/ghc-generic-deriving'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ghc-generic-deriving
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2840c8f !3 Update to 1.14.6 Merge pull request !3 from brucezhang/master