no matching MAC found. Their offer: hmac-sha2-512,hmac-sha2-256

A quicksolutiuon to this is to add MACs hmac-sha2-512,hmac-sha2-256

Host buggyhost.lan
    User git
    IdentityFile ~/.ssh/mykey
    CheckHostIP no
    MACs hmac-sha2-512,hmac-sha2-256