Support cloning remote actions from insecure Gitea instances (#92)

Related to https://github.com/go-gitea/gitea/issues/28693

Reviewed-on: https://gitea.com/gitea/act/pulls/92
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>

pkg/common/git/git.go

@@ -225,6 +225,9 @@ type NewGitCloneExecutorInput struct {
 	Ref   string
 	Dir   string
 	Token string
+
+	// For Gitea
+	InsecureSkipTLS bool
 }
 
 // CloneIfRequired ...
@@ -246,6 +249,8 @@ func CloneIfRequired(ctx context.Context, refName plumbing.ReferenceName, input
 		cloneOptions := git.CloneOptions{
 			URL:      input.URL,
 			Progress: progressWriter,
+
+			InsecureSkipTLS: input.InsecureSkipTLS, // For Gitea
 		}
 		if input.Token != "" {
 			cloneOptions.Auth = &http.BasicAuth{
@@ -305,6 +310,11 @@ func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 		// fetch latest changes
 		fetchOptions, pullOptions := gitOptions(input.Token)
 
+		if input.InsecureSkipTLS { // For Gitea
+			fetchOptions.InsecureSkipTLS = true
+			pullOptions.InsecureSkipTLS = true
+		}
+
 		err = r.Fetch(&fetchOptions)
 		if err != nil && !errors.Is(err, git.NoErrAlreadyUpToDate) {
 			return err