Fix rev-list for empty local tree.

home/bin/update-profile

@@ -48,7 +48,12 @@ fi
 		done
 
 		echo "Verifying updates..."
-		git rev-list --format=oneline HEAD..origin | while IFS= read -r line; do
+		ref="origin/master"
+		diffref="${ref}"
+		if git rev-parse HEAD >/dev/null 2>&1; then
+			diffref="HEAD..${diffref}"
+		fi
+		git rev-list --format=oneline "${diffref}" | while IFS= read -r line; do
 			sha="$(echo "$line" | awk '{print $1}')"
 			title="$(echo "$line" | cut -f 1 -d ' ' --complement)"
 			printf "  … $title\r  "