I'm having problems with git merging.
Instead of asking a question about the problems I am facing, I would like to ask a question about how to interpret arrow / branch histories when viewing a Git log using the "log" command in SmartGit.
Here are two screenshots of SmartGit magazine.
The first is understandable to me, but I turn it on so that people reading this question see the context of the branches. This shows the current end of the branches:

Here is a screenshot of the Git magazine, once previous in history:

I do not understand what is meant by the complex arrows in the screenshot above.
Here is what I understand do :
- The thin red and blue arrows represent a merger that has not yet been completed. I understand it.
:
, . , .
!