There are a few things that you need to ensure before getting ownership of this package. Make sure you are in the packagers group[1] and if the package is retired for more than 8 weeks, you need to file a Bugzilla ticket which is the package review tracking ticket it is required only for new or long retired packages[2].

[1] - https://docs.fedoraproject.org/en-US/package-maintainers/How_to_Get_Sponsored_into_the_Packager_Group/
[2] - https://docs.fedoraproject.org/en-US/package-maintainers/Package_Retirement_Process/#claiming