Git, fatal: The remote end hung up unexpectedly

When I tried to run

git push origin master --force

I just got

Counting objects: 2649, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (1280/1280), done.
error: RPC failed; result=22, HTTP code = 413 | 116 KiB/s   
fatal: The remote end hung up unexpectedly
Writing objects: 100% (2504/2504), 449.61 MiB | 4.19 MiB/s, done.
Total 2504 (delta 1309), reused 2242 (delta 1216)
fatal: The remote end hung up unexpectedly
Everything up-to-date

Is it something to do with not being secure? I tried creating a public key as in the answer for Fatal: The remote end hung up unexpectedly and running it again, but it still doesn't work. Am I not actually using the key? If so, how do I use it?

The problem is due to git/https buffer settings. In order to solve it (taken from Git fails when pushing commit to github)

git config http.postBuffer 524288000

And run the command again

Cause : The default file post size for Git has been exceeded.

Solution :

Navigate to repo.

Run the following command to increase the buffer to 500MB after navigating to the repository:

git config http.postBuffer 524288000

This looks similar to How do I get github to default to ssh and not https for new repositories. Probably it's worth trying to switch from http protocol to ssh:

$ git remote add origin [email protected]:username/project.git