Git 取/拉混淆

Question

I am a newbie in git and currently trying out various combinations to understand git.

I have a repository with branch named 'dev'. Now initially i brought my local in sync with the remote. Then i changed the remote directly from Github.

Now if i use

git fetch origin dev:dev

then i receive an error

fatal: Refusing to fetch into current branch refs/heads/dev of non-bare repository

However, the following pull command works fine

git pull origin dev

In one of the Stackoverflow answer it was mentioned that fetch followed by merge was equivalent to git pull.

If it is so then why this discrepency ?

Question Link : understanding git fetch then merge

PS : The answer suggested from link below in comments is correct one. However i was wondering that

git fetch origin 

fetches from all branches including the current one. Then why perform the check only in case of

git fetch origin master:master

I am not able to understand the reason behind this validation. Any help is appreciated.

Thanks

Answer 1

fatal: Refusing to fetch into current branch refs/heads/dev of non-bare repository

This error generally means that you're fetching a branch that doesn't have a remote branch. I'm making some assumptions here that you want to fetch from the origin repo and merge in the latest changes from dev to your local branch. If this is the case, then you want to try out following :

git fetch origin
git merge origin/dev