attempting to push to a git repo without doing a checkout

git_push_without_checkout.txt

# first create a bare repo

git init --bare test_origin.git

# now create a repo that will push to it

git init test_1
Initialized empty Git repository in /Users/masukomi/workspace/temp/test_1/.git/
cd test_1
echo "test file 1 content" > test1.txt
git add -A
git commit -m "Test file 1 commit"

# add the bare repo as a remote...

git remote add origin ../test_origin.git

# and push to it

git push origin master
 
# set up a second repo

cd ../
git init test_2
cd test_2
echo "test file 2 content" > test2.txt
git add -A
git commit -m "Test file 2 commit"

# add the remote repo

git remote add origin ../test_origin.git

# PUSHING TO IT WILL FAIL WITHOUT A PULL
# IN PREVIOUS VERSIONS OF GIT THIS WAS 
# POSSIBLE AS LONG AS IT DIDN'T CONFLICT

git push origin master
To ../test_origin.git
 ! [rejected]        master -> master (non-fast-forward)
error: failed to push some refs to '../test_origin.git'
To prevent you from losing history, non-fast-forward updates were rejected
Merge the remote changes (e.g. 'git pull') before pushing again.  See the
'Note about fast-forwards' section of 'git push --help' for details.