$ git clone -n https://gitee.com/opencloudos-stream/ghc-unix-compat.git /var/lib/mock/dist-oc9-epol-build-91833-59247/root/chroot_tmpdir/scmroot/ghc-unix-compat
Cloning into '/var/lib/mock/dist-oc9-epol-build-91833-59247/root/chroot_tmpdir/scmroot/ghc-unix-compat'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ghc-unix-compat
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a0a218 package init