fixtures: Add DotGitHash to tags repository (#113)

Author: ajnavarro

fixtures/fixtures.go

@@ -66,9 +66,10 @@ var fixtures = Fixtures{{
 	DotGitHash:   core.NewHash("174be6bd4292c18160542ae6dc6704b877b8a01a"),
 	ObjectsCount: 2133,
 }, {
-	Tags:         []string{"packfile", "tags"},
+	Tags:         []string{"packfile", ".git", "tags"},
 	URL:          "https://github.com/git-fixtures/tags.git",
 	Head:         core.NewHash("f7b877701fbf855b44c0a9e86f3fdce2c298b07f"),
+	DotGitHash:   core.NewHash("c0c7c57ab1753ddbd26cc45322299ddd12842794"),
 	PackfileHash: core.NewHash("b68617dd8637fe6409d9842825a843a1d9a6e484"),
 }, {
 	Tags:         []string{"packfile"},