diff --git a/diff.go b/diff.go
index 9a7ac78..8ae0512 100644
--- a/diff.go
+++ b/diff.go
@@ -217,6 +217,33 @@
 	return int(C.git_diff_stats_files_changed(stats.ptr))
 }
 
+type DiffStatsFormat int
+
+const (
+	DiffStatsNone           DiffStatsFormat = C.GIT_DIFF_STATS_NONE
+	DiffStatsFull           DiffStatsFormat = C.GIT_DIFF_STATS_FULL
+	DiffStatsShort          DiffStatsFormat = C.GIT_DIFF_STATS_SHORT
+	DiffStatsNumber         DiffStatsFormat = C.GIT_DIFF_STATS_NUMBER
+	DiffStatsIncludeSummary DiffStatsFormat = C.GIT_DIFF_STATS_INCLUDE_SUMMARY
+)
+
+func (stats *DiffStats) String(format DiffStatsFormat,
+	width uint) (string, error) {
+	buf := C.git_buf{}
+	defer C.git_buf_free(&buf)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_diff_stats_to_buf(&buf,
+		stats.ptr, C.git_diff_stats_format_t(format), C.size_t(width))
+	if ret < 0 {
+		return "", MakeGitError(ret)
+	}
+
+	return C.GoString(buf.ptr), nil
+}
+
 func (diff *Diff) Stats() (*DiffStats, error) {
 	stats := new(DiffStats)
 
diff --git a/repository.go b/repository.go
index 77e9f9c..efc506e 100644
--- a/repository.go
+++ b/repository.go
@@ -28,7 +28,7 @@
 	// read, write and delete notes from this repository.
 	Notes NoteCollection
 	// Tags represents the collection of tags and can be used to create,
-	// list and iterate tags in this repository.
+	// list, iterate and remove tags in this repository.
 	Tags TagsCollection
 }
 
diff --git a/reset.go b/reset.go
index 9da7625..031f5bd 100644
--- a/reset.go
+++ b/reset.go
@@ -24,3 +24,19 @@
 	}
 	return nil
 }
+
+func (r *Repository) ResetDefaultToCommit(commit *Commit, pathspecs []string) error {
+	cpathspecs := C.git_strarray{}
+	cpathspecs.count = C.size_t(len(pathspecs))
+	cpathspecs.strings = makeCStringsFromStrings(pathspecs)
+	defer freeStrarray(&cpathspecs)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+	ret := C.git_reset_default(r.ptr, commit.ptr, &cpathspecs)
+
+	if ret < 0 {
+		return MakeGitError(ret)
+	}
+	return nil
+}
diff --git a/tag.go b/tag.go
index 8957430..81d7258 100644
--- a/tag.go
+++ b/tag.go
@@ -83,6 +83,21 @@
 	return oid, nil
 }
 
+func (c *TagsCollection) Remove(name string) error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	ret := C.git_tag_delete(c.repo.ptr, cname)
+	if ret < 0 {
+		return MakeGitError(ret)
+	}
+
+	return nil
+}
+
 // CreateLightweight creates a new lightweight tag pointing to a commit
 // and returns the id of the target object.
 //