VersionControlManager.activeVersionControlObject

Description

The VersionControlObject representing active VCS.

If there is no currently active VersionControlObject, this property returns null.

using UnityEditor;
using UnityEditor.VersionControl;
using UnityEngine;

static class Example
{
    [MenuItem("Example/Print Active VCS")]
    static void PrintActiveVCS()
    {
        var vco = VersionControlManager.activeVersionControlObject;
        if (vco != null)
            Debug.Log("Active VCS: " + vco.name);
        else
            Debug.Log("VCS is not activated.");
    }
}

Additional resources: VersionControlManager, VersionControlObject, Provider.