scripts: use "git foo" not "git-foo"

We want to make sure that people who copy & paste code would see
fewer instances of "git-foo".  The use of these dashed forms have
been discouraged since v1.6.0 days.

Signed-off-by: Michael Forney <mforney@mforney.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-merge-one-file.sh b/git-merge-one-file.sh
index 424b034..9879c59 100755
--- a/git-merge-one-file.sh
+++ b/git-merge-one-file.sh
@@ -115,16 +115,16 @@
 		;;
 	esac
 
-	src1=$(git-unpack-file $2)
-	src2=$(git-unpack-file $3)
+	src1=$(git unpack-file $2)
+	src2=$(git unpack-file $3)
 	case "$1" in
 	'')
 		echo "Added $4 in both, but differently."
-		orig=$(git-unpack-file e69de29bb2d1d6434b8b29ae775ad8c2e48c5391)
+		orig=$(git unpack-file e69de29bb2d1d6434b8b29ae775ad8c2e48c5391)
 		;;
 	*)
 		echo "Auto-merging $4"
-		orig=$(git-unpack-file $1)
+		orig=$(git unpack-file $1)
 		;;
 	esac