Invoke 'callback' for each entry in the given FETCH_HEAD file.
Return a non-zero value from the callback to stop the loop.
A repository object
Callback function
Pointer to callback data (optional)
0 on success, non-zero callback return value, git_error_code.GIT_ENOTFOUND if there is no FETCH_HEAD file, or other error code.
See Implementation
Invoke 'callback' for each entry in the given FETCH_HEAD file.
Return a non-zero value from the callback to stop the loop.