- Moved git last-commit to a script.

.gitconfig

@@ -11,7 +11,6 @@
     ff = merge --no-edit --ff-only master
     fixup = !git commit --fixup $(git last-commit)
     forget = reset HEAD^
-    last-commit = "!git log --no-merges --abbrev-commit --format=\"%h %s\" | awk '{if ($2 != \"fixup!\" && $2 != \"squash!\") {print $1; exit}}'"
     merg = merge --no-edit
     posh = push --set-upstream origin HEAD
     pul = pull --progress

Documents/bin/git-last-commit

+#!/bin/sh
+set -eu
+
+git log --no-merges --abbrev-commit --format="%h %s" | awk '{if ($2 != "fixup!" && $2 != "squash!") {print $1; exit}}'