Added git expansion for checkout based on hg expansion

Examples-(completion).md

@@ -86,4 +86,27 @@ _fzf_complete_hg() {
 _fzf_complete_hg_post() {
   cut -f1 -d' '
 }
+```
+
+### Complete `git co` (for example)
+
+You can use the same approach as above to complete any git command. In the example below, completion is triggered on `git co` (usual alias for `git checkout`):
+
+```sh
+_fzf_complete_git() {
+    ARGS="$@"
+    local branches
+    branches=$(git branch -vv --all)
+    if [[ $ARGS == 'git co'* ]]; then
+        _fzf_complete "--reverse --multi" "$@" < <(
+            echo $branches
+        )
+    else
+        eval "zle ${fzf_default_completion:-expand-or-complete}"
+    fi
+}
+
+_fzf_complete_git_post() {
+    awk '{print $1}'
+}
 ```