How to Automock for existing mock object?

Question

In my existing project, I am using xunit. Currently, it's very irritating to mock each instant in service. So I decided to use AutoMock but my project is very vast and I have already done a lot of code and assigned a lot of values. So is this any way that without changing existing mock object I can use AutoMock? Below is my existing code sample. I am planning to use AutoFac

Currently, if I want to set up any value I am doing

bordereauFormatsRepositoryMock
    .Setup(x => x.GetBordereauFormats(It.IsAny<List<string>>()))
    .Returns(botFormatsVMList);*

In AutoMock -

mock.Mock<IBordereauFormatsRepository>()
    .Setup(x => x.GetBordereauFormats(It.IsAny<List<string>>()))
    .Returns(botFormatsVMList)*;

So How can I assign bordereauFormatsRepositoryMock to mock.Mock<IBordereauFormatsRepository>()?

public BotMockTest()
{
    #region Object initialization
    botFormatsVMList = new List<BotFormatsVM>();
    botFormatsVM = new BotFormatsVM();
    botService = new BotService(bordereauFormatsRepositoryMock.Object, bordereauFormatColumnRepositoryMock.Object, contractRepository.Object, bordereauxRepositoryMock.Object, exceptionLogServiceMock.Object);
    #endregion
}

[FactWithAutomaticDisplayName]
public void GetBordereauFormats()
{
    //Arrange
    List<string> sheetList = new List<string>() { { "sheet" } };
    botFormatsVM.BordereauFormatId = Guid.Parse("847AE6BD-C20E-4377-8F56-36D58674C961");
    botFormatsVMList.Add(botFormatsVM);
    bordereauFormatsRepositoryMock.Setup(x => x.GetBordereauFormats(It.IsAny<List<string>>())).Returns(botFormatsVMList);

    //Act
    botService.GetBordereauFormats(sheetList);

    //Assert
    Assert.True(botFormatsVM.BordereauFormatName == "UpdatedVal");
}