add new command (#217)

Co-authored-by: Salvo Rapisarda <sd.rapisarda@innonation.it>

Author: salvorapi

README.md

@@ -178,6 +178,7 @@ P.S: All these commands are tested on `git version 2.7.4 (Apple Git-66)`.
 * [Use SSH instead of HTTPs for remotes](#use-ssh-instead-of-https-for-remotes)
 * [Update a submodule to the latest commit](#update-a-submodule-to-the-latest-commit)
 * [Prevent auto replacing LF with CRLF](#prevent-auto-replacing-lf-with-crlf)
+* [Refresh the list of remote branches](#refresh-the-list-of-remote-branches)
 
 <!-- Don’t remove or change the comment below – that can break automatic updates. More info at <http://npm.im/doxie.inject>. -->
 <!-- @doxie.inject end toc -->
@@ -999,6 +1000,7 @@ __Alternatives:__
 git branch <branch-name> && git checkout <branch-name>
 ```
 
+
 ```sh
 git switch -c <branch-name>
 ```
@@ -1264,5 +1266,10 @@ git commit -m "submodule updated"
 git config --global core.autocrlf false
 ```
 
+## Refresh the list of remote branches
+```sh
+git remote update origin --prune
+```
+
 <!-- Don’t remove or change the comment below – that can break automatic updates. More info at <http://npm.im/doxie.inject>. -->
 <!-- @doxie.inject end -->

tips.json

@@ -531,5 +531,8 @@
 	}, {
 		"title": "Prevent auto replacing LF with CRLF",
 		"tip": "git config --global core.autocrlf false"
+	}, {
+		"title": "Refresh the list of remote branches",
+		"tip": "git remote update origin --prune"
 	}
 ]