VIM: Hides git branch "blob" on status line if not in a git project

nvim/.config/nvim/plugin/statusline.vim

@@ -85,10 +85,13 @@ function! DetectMode(mode)
 
 	" git branch
 	if exists("*FugitiveHead")
+		let head = FugitiveHead()
+		if head != ''
 			let statusline .= "%#GruvboxBg4#\ " . left
-		let statusline .= "%#PmenuThumb#%{FugitiveHead()}"
+			let statusline .= "%#PmenuThumb#" . head
 			let statusline .= "%#GruvboxBg4#" . right . "\ "
 		endif
+	endif
 
 	" Filetype
 	let statusline .= "%#GruvboxBlue#\ " . left