Add git conditional configuration

src/dev/tools/git.md

@@ -25,3 +25,20 @@ git commit --ammend --no-edit
 ```shell
 git rev-parse HEAD | xclip
 ```
+
+## Conditional Git configuration
+
+Since git 2.13, there is an option to include configuration (or not) based on a condition
+
+Here is an example use case
+
+```txt
+# Specific configurations for work and personnal repos
+[includeIf "gitdir:~/code/work/"]
+    path = .gitconfig.work
+[includeIf "gitdir:~/code/oss/"]
+    path = .gitconfig.oss
+```
+
+If include, settings in any configuration found file provided by the path
+parameter will by append to or will overide current configuration.