git shas applies to argument instead of always HEAD

dotfiles/gitconfig

@@ -39,7 +39,7 @@
 	s = status -s
 	set-working-tree = "!s() { local head=\"$(git rev-parse HEAD)\"; git reset --hard $1 && git reset --soft $head; }; s"
 	sha = rev-parse HEAD
-	shas = log HEAD --pretty=format:%H
+	shas = log --pretty=format:%H
 	suir = submodule update --init --recursive
 	tb = rev-parse --abbrev-ref --symbolic-full-name @{u}
 	untracked = "!u() { git status -s | grep "??" | awk '{print $2}'; }; u"