Yes it is.
Now create your fork, create there some branch like issue/minumum-score and work in it locally.
Do you know “git flow”? It will help you to work in git in nice manner. For github I prefer to use prefix “issue” for features.
Here is my config just in case:
garex@ustimenko ~/src/github/wp-testing $ cat .git/config
[core]
repositoryformatversion = 0
filemode = true
bare = false
logallrefupdates = true
[remote "origin"]
url = [email protected]:garex/wp-testing.git
fetch = +refs/heads/*:refs/remotes/origin/*
push = refs/heads/*:refs/heads/*
[branch "develop"]
remote = origin
merge = refs/heads/develop
rebase = true
[branch "master"]
remote = origin
merge = refs/heads/master
rebase = true
[gitflow "branch"]
master = master
develop = develop
[gitflow "prefix"]
feature = issue/
release = release/
hotfix = hotfix/
support = support/
versiontag =