diff --git a/autoload/airline/extensions/branch.vim b/autoload/airline/extensions/branch.vim
index 954b0f6..250184d 100644
--- a/autoload/airline/extensions/branch.vim
+++ b/autoload/airline/extensions/branch.vim
@@ -21,7 +21,12 @@ function! s:get_git_branch(path)
   else
     try
       let line = join(readfile(dir . '/HEAD'))
-      let name = strpart(line, 16)
+      if strpart(line, 0, 16) == 'ref: refs/heads/'
+        let name = strpart(line, 16)
+      else
+        " raw commit hash
+        let name = strpart(line, 0, 7)
+      endif
     catch
       let name = ''
     endtry
@@ -39,7 +44,7 @@ function! airline#extensions#branch#head()
   let b:airline_head = ''
 
   if s:has_fugitive && !exists('b:mercurial_dir')
-    let b:airline_head = fugitive#head()
+    let b:airline_head = fugitive#head(7)
 
     if empty(b:airline_head) && !exists('b:git_dir')
       let b:airline_head = s:get_git_branch(expand("%:p:h"))