How to fetch github PRs as branches

gistfile1.txt

By adding one simple line to the config file  a  github repo's local clone, it is possible to fetch pull requests(PRs) as branches, which can be very convenient for reviewers for local testing of PRs and trying to help solve issues.

conceptually, one adds this line to the section `[ remote "origin"]` og `.git/config` in the checkout dir:

```ini

+refs/pull/*/head:refs/remotes/origin/pr/*
 
 ```
 


Then `git fetch origin` will  create local branches `origin/pr/NUMBER` locally, e. g. PR number 1 will be available locally as `/origin/pr/1`. 

Here is a more complete example for the Rook project:

clone the repo:

```console
$ git clone +refs/pull/*/head:refs/remotes/origin/pr/*
$ cd rook

```
Now `.git/config`looks like this:

```ini
...
[remote "origin"]
        url = [email protected]:rook/rook.git
        fetch = +refs/heads/*:refs/remotes/origin/*
...
```

add a line to the section:

```ini
...
[remote "origin"]
        url = [email protected]:rook/rook.git
        fetch = +refs/heads/*:refs/remotes/origin/*
fetch = +refs/pull/*/head:refs/remotes/origin/pr/*
...
```

now here is an example output of a `git fetch`(after some time of working on the repo:

```console
$ git fetch origin
remote: Enumerating objects: 5, done.
remote: Counting objects: 100% (3/3), done.
remote: Total 5 (delta 3), reused 3 (delta 3), pack-reused 2 (from 1)
Unpacking objects: 100% (5/5), 576 bytes | 96.00 KiB/s, done.
From github.com:rook/rook
 + 4d0dadf82...b79192083 refs/pull/16349/head -> origin/pr/16349  (forced update)
 + b67ab45ac...89ce129e1 refs/pull/16388/head -> origin/pr/16388  (forced update)
 $ git branch -r | grep pr
 ...
 origin/pr/9990
 origin/pr/9991
 origin/pr/9992
 origin/pr/9993
 origin/pr/9997
 origin/pr/9998
 origin/pr/9999

...
$ 
```