I specifically tested it on the OSC website and found that it works. Here is the code I used

The detailed Repository can be found at http://git.oschina.net/redchamber/testproj

I added jpg and png files in the root directory and images directory respectively. The code is as follows

git add images
git commit -m "Test"
git push

Your push failed. Can you please post the command used and the corresponding error output? When asking technical questions, you have done a good job by pointing out the operating system you are using, but if you can post the corresponding commands and output, it will be very helpful for others to help you analyze, locate and solve the problem.

Also: I am not from OSC, I am just a netizen who is making soy sauce ^_^

liudeMacBook-Pro-3:testproj larry$ git status
# On branch master
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#   test.jpg
#   test.png
nothing added to commit but untracked files present (use "git add" to track)
liudeMacBook-Pro-3:testproj larry$ git add .
liudeMacBook-Pro-3:testproj larry$ git commit -m "Add image files for testing"
[master 49a8cd7] Add image files for testing
 2 files changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 test.jpg
 create mode 100644 test.png
liudeMacBook-Pro-3:testproj larry$ git push
Counting objects: 4, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (3/3), 106.80 KiB | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
To http://git.oschina.net/redchamber/testproj.git
   85c1353..49a8cd7  master -> master
liudeMacBook-Pro-3:testproj larry$