Update switch-to-dev-branch.md

[ALfuhrmann]

checkout did not work if you did not already have a "dev" branch locally. "git fetch origin dev:dev" fetches and creates local "dev" branch, which can now be switched to. So if you use this script on a new installation, it fails.

Test:

mkdir zigbee2mqtt
git clone --depth 1 https://github.com/Koenkk/zigbee2mqtt.git zigbee2mqtt
cd zigbee2mqtt
git fetch origin dev
git checkout dev # Change 'dev' to 'master' to switch back to the release version

result:

zigbee2mqtt $ git checkout dev
error: pathspec 'dev' did not match any file(s) known to git

"git fetch origin dev:dev" fixes this edge case

[Koenkk]

Could you try with git fetch origin instead of git fetch origin dev?

[ALfuhrmann]

Could you try with git fetch origin instead of git fetch origin dev?

Like this?

pi@pi:~/test $ git clone --depth 1 https://github.com/Koenkk/zigbee2mqtt.git .
Cloning into '.'...
remote: Enumerating objects: 143, done.
remote: Counting objects: 100% (143/143), done.
remote: Compressing objects: 100% (138/138), done.
remote: Total 143 (delta 7), reused 63 (delta 1), pack-reused 0 (from 0)
Receiving objects: 100% (143/143), 572.27 KiB | 2.54 MiB/s, done.
Resolving deltas: 100% (7/7), done.
pi@pi:~/test $ git fetch origin
pi@pi:~/test $ git checkout dev
error: pathspec 'dev' did not match any file(s) known to git
pi@pi:~/test $

[Koenkk]

I see, doesn't work indeed. I confirmed your fix, thanks!