Adding the ability to track versions of a commitish revision

bin/vcsvimdiff

@@ -123,7 +123,7 @@ sub replay {
     my $tmp = "$temp_dir/$$.$name." . path($file)->basename;
 
     my $warned   = 0;
-    my $versions = $vcs->log( $file );
+    my $versions = $vcs->log( ($rev_old ? ($rev_old) : ()), $file );
     if ( $option{verbose} > 2 ) {
         my $i = 0;
         my $j = -2;