git: worktree, add Clean() method for git clean

This change implement git clean with a `Dir` option. By default, clean
removes only the untracked files in the working directory. If `Dir`
option is set to true, untracked files under other directories are also
cleaned.

1 files changed, 5 insertions, 0 deletions

diff --git a/options.go b/options.go
index d2cec4b..e5745ea 100644
--- a/options.go
+++ b/options.go
@@ -360,3 +360,8 @@ type ListOptions struct {
 	// Auth credentials, if required, to use with the remote repository.
 	Auth transport.AuthMethod
 }
+
+// CleanOptions describes how a clean should be performed.
+type CleanOptions struct {
+	Dir bool
+}