t / t5100 / patch0016--no-inbody-headerson commit try_remove_empty_parents(): teach to remove parents of reflogs, too (a8f0db2)
   1---
   2diff --git a/foo b/foo
   3index e69de29..d95f3ad 100644
   4--- a/foo
   5+++ b/foo
   6@@ -0,0 +1 @@
   7+content
   8