SELECT distinct c.sha1
FROM revision rev
inner join directory dir on rev.directory = dir.id
inner join directory_entry_file def on def.id = any(dir.file_entries)
inner join content c on c.sha1_git = def.target
WHERE def.name IN
('readme',
'readme.markdown',
'readme.mdown',
'readme.mkdn',
'readme.md',
'readme.textile',
'readme.rdoc',
'readme.org',
'readme.creole',
'readme.mediawiki',
'readme.wiki',
'readme.rst',
'readme.asciidoc',
'readme.adoc',
'readme.asc',
'readme.pod',
'README',
'README.markdown',
'README.mdown',
'README.mkdn',
'README.md',
'README.textile',
'README.rdoc',
'README.org',
'README.creole',
'README.mediawiki',
'README.wiki',
'README.rst',
'README.asciidoc',
'README.adoc',
'README.asc',
'README.pod')