Address open tasks for Part 2

[j-i-l]

Part 2 along with Part 3 (probably) will be built in https://github.com/t4d-gmbh/git-and-its-remotes

The following tasks are needed for Part 2:

• [x] t4d-gmbh/git-and-its-remotes#1
• [ ] t4d-gmbh/git-and-its-remotes#4
• [x] t4d-gmbh/git-and-its-remotes#3
• [ ] t4d-gmbh/git-and-its-remotes#5
• [ ] t4d-gmbh/git-and-its-remotes#6
• [ ] t4d-gmbh/git-and-its-remotes#7
• [ ] t4d-gmbh/git-and-its-remotes#8