fix: Fixes git over azure devops Fixes #11705

Signed-off-by: Christian Lütke Stetzkamp <cls@tessitura.io>

workflow/artifacts/git/git.go

@@ -10,6 +10,7 @@ import (
 	"github.com/go-git/go-git/v5"
 	"github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
 	"github.com/go-git/go-git/v5/plumbing/transport"
 	"github.com/go-git/go-git/v5/plumbing/transport/http"
 	ssh2 "github.com/go-git/go-git/v5/plumbing/transport/ssh"
@@ -84,6 +85,19 @@ func (g *ArtifactDriver) Delete(s *wfv1.Artifact) error {
 
 func (g *ArtifactDriver) Load(inputArtifact *wfv1.Artifact, path string) error {
 	a := inputArtifact.Git
+
+	// Azure DevOps requires multi_ack* capabilities which go-git does not currently support
+	// Workaround: removing these from UnsupportedCapabilities allows clones to work (see https://github.com/go-git/go-git/pull/613)
+	// TODO: remove this once https://github.com/go-git/go-git/issues/64 is fully fixed
+	var newCaps []capability.Capability
+	for _, c := range transport.UnsupportedCapabilities {
+		if c == capability.MultiACK || c == capability.MultiACKDetailed {
+			continue
+		}
+		newCaps = append(newCaps, c)
+	}
+	transport.UnsupportedCapabilities = newCaps
+
 	sshUser := GetUser(a.Repo)
 	closer, auth, err := g.auth(sshUser)
 	if err != nil {