feat: recipe fetch command

Also may have rooted out another go-git cloning bug 🙄

Closes coop-cloud/organising#365

pkg/git/branch.go

@@ -10,9 +10,10 @@ import (
 
 // Check if a branch exists in a repo. Use this and not repository.Branch(),
 // because the latter does not actually check for existing branches. See
-// https://github.com/go-git/go-git/issues/518 for more.
+// https://github.com/gogit/gogit/issues/518 for more.
 func HasBranch(repository *git.Repository, name string) bool {
 	var exist bool
+
 	if iter, err := repository.Branches(); err == nil {
 		iterFunc := func(reference *plumbing.Reference) error {
 			if name == reference.Name().Short() {
@@ -23,6 +24,7 @@ func HasBranch(repository *git.Repository, name string) bool {
 		}
 		_ = iter.ForEach(iterFunc)
 	}
+
 	return exist
 }
 

pkg/git/clone.go

@@ -15,22 +15,32 @@ import (
 func Clone(dir, url string) error {
 	if _, err := os.Stat(dir); os.IsNotExist(err) {
 		logrus.Debugf("%s does not exist, attempting to git clone from %s", dir, url)
-		_, err := git.PlainClone(dir, false, &git.CloneOptions{URL: url, Tags: git.AllTags})
+
+		_, err := git.PlainClone(dir, false, &git.CloneOptions{
+			URL:           url,
+			Tags:          git.AllTags,
+			ReferenceName: plumbing.ReferenceName("refs/heads/master"),
+			SingleBranch:  true,
+		})
 		if err != nil {
 			logrus.Debugf("cloning %s default branch failed, attempting from main branch", url)
+
 			_, err := git.PlainClone(dir, false, &git.CloneOptions{
 				URL:           url,
 				Tags:          git.AllTags,
 				ReferenceName: plumbing.ReferenceName("refs/heads/main"),
+				SingleBranch:  true,
 			})
 			if err != nil {
 				if strings.Contains(err.Error(), "authentication required") {
 					name := filepath.Base(dir)
 					return fmt.Errorf("unable to clone %s, does %s exist?", name, url)
 				}
+
 				return err
 			}
 		}
+
 		logrus.Debugf("%s has been git cloned successfully", dir)
 	} else {
 		logrus.Debugf("%s already exists", dir)