How to find the cause of 'git push' stopping on 'Writing objects'?

[Luuk <luuk34@gmail.com>]

I am new to GIT, so i'm playing around with a repository and git is 
hanging on 'git push',
How can i find out what i'm doing wrong here?

D:\TEMP\test\test>git remote -v
origin  git://mini/test.git (fetch)
origin  git://mini/test.git (push)

D:\TEMP\test\test>git status
On branch master
Your branch is ahead of 'origin/master' by 3 commits.
   (use "git push" to publish your local commits)
nothing to commit, working tree clean

D:\TEMP\test\test>git push -v
Pushing to git://mini/test.git
Looking up mini ... done.
Connecting to mini (port 9418) ... 192.168.178.50 done.
Counting objects: 9, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (9/9), done.
^Citing objects: 100% (9/9)
D:\TEMP\test\test>
D:\TEMP\test\test>git add *

D:\TEMP\test\test>git push -v
Pushing to git://mini/test.git
Looking up mini ... done.
Connecting to mini (port 9418) ... 192.168.178.50 done.
Counting objects: 9, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (9/9), done.
^Citing objects: 100% (9/9)
D:\TEMP\test\test>
D:\TEMP\test\test>git status
On branch master
Your branch is ahead of 'origin/master' by 3 commits.
   (use "git push" to publish your local commits)
nothing to commit, working tree clean

D:\TEMP\test\test>git fetch -v
Looking up mini ... done.
Connecting to mini (port 9418) ... 192.168.178.50 done.
 From git://mini/test
  = [up to date]      master     -> origin/master

D:\TEMP\test\test>git --version
git version 2.12.0.windows.1

D:\TEMP\test\test>

The git-server i'm using is on a mac-mini:
git --version
git version 2.10.1 (Apple Git-78)