scp(1) はhard linkを認識しないようだ

野良ビルドのGitのインストール先ディレクトリをそのまま別マシンに scp(1) しちゃえ！ と思ったら，hard linkで作られてる prefix/libexec/git-core/git-* 達，各 4.8 MB が全部それぞれコピーされてひどいことになった．以下は野良ビルドじゃなくてDebianでの結果だけど，

$ ls -i /usr/lib/git-core|ruby -ane 'BEGIN{$h=Hash.new{|h,k|[]}}; $h[$F[0].to_i]<<=$F[1]; END{$h.each{|e|p e}}'
[268515, ["git-request-pull*"]]
[268504, ["git-mergetool*"]]
[268493, ["git-gui*"]]
[268482, ["git-am*"]]
[268521, ["git-svn*"]]
[268510, ["git-rebase--interactive*"]]
[268499, ["git-instaweb*"]]
[268488, ["git-daemon*"]]
[268516, ["git-sh-setup"]]
[268505, ["git-mergetool--lib"]]
[268494, ["git-gui--askpass*"]]
[268483, ["git-bisect*"]]
[268522, ["git-upload-pack*"]]
[268511, ["git-relink*"]]
[268500, ["git-lost-found*"]]
[268489, ["git-difftool*"]]
[268517, ["git-shell*"]]
[268506, ["git-parse-remote"]]
[268495, ["git-http-backend*"]]
[268484, ["git-citool*"]]
[268523, ["git-web--browse*"]]
[268512, ["git-remote-ftp*", "git-remote-ftps*", "git-remote-http*", "git-remote-https*"]]
[268501, ["git-merge-octopus*"]]
[268490, ["git-difftool--helper*"]]
[268518, ["git-show-index*"]]
[268507, ["git-pull*"]]
[268496, ["git-http-fetch*"]]
[268485, ["git-cvsexportcommit*"]]
[268524, ["git*", "git-add*", "git-annotate*", "git-apply*", "git-archive*", "git-bisect--helper*",
"git-blame*", "git-branch*", "git-bundle*", "git-cat-file*", "git-check-attr*", "git-check-ref-format*",
"git-checkout*", "git-checkout-index*", "git-cherry*", "git-cherry-pick*", "git-clean*", "git-clone*",
"git-commit*", "git-commit-tree*", "git-config*", "git-count-objects*", "git-describe*", "git-diff*",
"git-diff-files*", "git-diff-index*", "git-diff-tree*", "git-fast-export*", "git-fetch*", "git-fetch-pack*",
"git-fmt-merge-msg*", "git-for-each-ref*", "git-format-patch*", "git-fsck*", "git-fsck-objects*", "git-gc*",
"git-get-tar-commit-id*", "git-grep*", "git-hash-object*", "git-help*", "git-index-pack*", "git-init*",
"git-init-db*", "git-log*", "git-ls-files*", "git-ls-remote*", "git-ls-tree*", "git-mailinfo*",
"git-mailsplit*", "git-merge*", "git-merge-base*", "git-merge-file*", "git-merge-index*", "git-merge-ours*",
"git-merge-recursive*", "git-merge-subtree*", "git-merge-tree*", "git-mktag*", "git-mktree*", "git-mv*",
"git-name-rev*", "git-notes*", "git-pack-objects*", "git-pack-redundant*", "git-pack-refs*", "git-patch-id*",
"git-peek-remote*", "git-prune*", "git-prune-packed*", "git-push*", "git-read-tree*", "git-receive-pack*",
"git-reflog*", "git-remote*", "git-remote-ext*", "git-remote-fd*", "git-replace*", "git-repo-config*",
"git-rerere*", "git-reset*", "git-rev-list*", "git-rev-parse*", "git-revert*", "git-rm*", "git-send-pack*",
"git-shortlog*", "git-show*", "git-show-branch*", "git-show-ref*", "git-stage*", "git-status*",
"git-stripspace*", "git-symbolic-ref*", "git-tag*", "git-tar-tree*", "git-unpack-file*", "git-unpack-objects*",
"git-update-index*", "git-update-ref*", "git-update-server-info*", "git-upload-archive*", "git-var*",
"git-verify-pack*", "git-verify-tag*", "git-whatchanged*", "git-write-tree*"]]
[268513, ["git-remote-testgit*"]]
[268502, ["git-merge-one-file*"]]
[268491, ["git-fast-import*"]]
[268519, ["git-stash*"]]
[268508, ["git-quiltimport*"]]
[268497, ["git-http-push*"]]
[268486, ["git-cvsimport*"]]
[268514, ["git-repack*"]]
[268503, ["git-merge-resolve*"]]
[268492, ["git-filter-branch*"]]
[268481, ["git-add--interactive*"]]
[268520, ["git-submodule*"]]
[268509, ["git-rebase*"]]
[268498, ["git-imap-send*"]]
[268487, ["git-cvsserver*"]]

なんでsymbolic linkでなくhard linkなのかな？ 実行速度に差がある？