Solr has become a top-level Apache project and main line 
development for Lucene and Solr is happening in each 
project's git repository now:

- Lucene: <https://gitbox.apache.org/repos/asf/lucene.git>
- Solr: <https://gitbox.apache.org/repos/asf/solr.git>

If you're seeing this message then switch the development to 'main':
git checkout main

Development for branch 8x remains in the shared repository:

Where can I get the latest release?
-----------------------------------
You can download the release source from our [download page][maven-download].

Contributing
------------

If you are interested in the development of Maven, please consult the
documentation first and afterward you are welcome to join the developers
mailing list to ask questions or discuss new ideas/features/bugs etc.