remove head from git diff command, rename unstaged to staged (#1439)

pkg/gitparse/gitparse.go

@@ -140,10 +140,10 @@ func (c *Parser) RepoPath(ctx context.Context, source string, head string, abbre
 	return c.executeCommand(ctx, cmd)
 }
 
-// Unstaged parses the output of the `git diff` command for the `source` path.
-func (c *Parser) Unstaged(ctx context.Context, source string) (chan Commit, error) {
+// Staged parses the output of the `git diff` command for the `source` path.
+func (c *Parser) Staged(ctx context.Context, source string) (chan Commit, error) {
 	// Provide the --cached flag to diff to get the diff of the staged changes.
-	args := []string{"-C", source, "diff", "-p", "--cached", "--full-history", "--diff-filter=AM", "--date=format:%a %b %d %H:%M:%S %Y %z", "HEAD"}
+	args := []string{"-C", source, "diff", "-p", "--cached", "--full-history", "--diff-filter=AM", "--date=format:%a %b %d %H:%M:%S %Y %z"}
 
 	cmd := exec.Command("git", args...)
 

pkg/sources/git/git.go

@@ -482,7 +482,7 @@ func (s *Git) ScanStaged(ctx context.Context, repo *git.Repository, path string,
 	// Get the URL metadata for reporting (may be empty).
 	urlMetadata := getSafeRemoteURL(repo, "origin")
 
-	commitChan, err := gitparse.NewParser().Unstaged(ctx, path)
+	commitChan, err := gitparse.NewParser().Staged(ctx, path)
 	if err != nil {
 		return err
 	}