PS C:> Get-ClusterResource AOGROUPNAME* | FT -autosize
Name                      State  OwnerGroup   ResourceType
----                      -----  ----------   ------------
AOGROUPNAME               Online AOGROUPNAME  SQL Server Availability Group
AOGROUPNAME_10.1.2.3      Online AOGROUPNAME  IP Address
AOGROUPNAME_AOGROUPNAME   Online AOGROUPNAME  Network Name

PS C:> Get-ClusterResource NEWNAME* | FT -autosize
Name                  State  OwnerGroup   ResourceType
----                  -----  ----------   ------------
NEWNAME               Online NEWNAME      SQL Server Availability Group
NEWNAME_10.1.2.3      Online NEWNAME      IP Address
NEWNAME_OLDNAME       Online NEWNAME      Network Name

PS C:> Get-ClusterResource "NEWNAME_OLDNAME"| % { $_.Name="NEWNAME_NEWNAME"}