- Normally "git-write-tree" ensures that the objects referenced by the
- directory exist in the object database. This option disables this check.
+ Normally `git-write-tree` ensures that the objects referenced by the
+ directory exist in the object database. This option disables this
+ check.
+
+--prefix=<prefix>/::
+ Writes a tree object that represents a subdirectory
+ `<prefix>`. This can be used to write the tree object
+ for a subproject that is in the named subdirectory.
+