Make the current Git branch a master branch
Solution 1:
The problem with the other two answers is that the new master doesn't have the old master as an ancestor, so when you push it, everyone else will get messed up. This is what you want to do:
git checkout better_branch
git merge --strategy=ours master # keep the content of this branch, but record a merge
git checkout master
git merge better_branch # fast-forward master up to the merge
If you want your history to be a little clearer, I'd recommend adding some information to the merge commit message to make it clear what you've done. Change the second line to:
git merge --strategy=ours --no-commit master
git commit # add information to the template merge message
Solution 2:
Make sure everything is pushed up to your remote repository (GitHub):
git checkout main
Overwrite "main" with "better_branch":
git reset --hard better_branch
Force the push to your remote repository:
git push -f origin main