Push/Pull a local repository to a remote git location
Lets take an example. I have my local repo pointing to openstack/neutron.git. I made some changes in my local repo and want to take backup before I send the code for review. I just need to add 'remote' location and push the code there.
git remote add githubbackup <url>
You can verify by looking into .git/config file if remote is added as expected.
Now push the code from master
git push githubbackup master
If you want to pull the code from actual repo
git pull origin master
Similarly to pull from githubbackup
git pull githubbackup master
For generating the patches from the topmost commits from a specific sha1 hash:
git format-patch -<n> <SHA1>
The last 10 patches from head in a single patch file:
git format-patch -10 HEAD --stdout > 0001-last-10-commits.patch