RewriteCond %{REQUEST_URI} ^/repos [NC]
RewriteCond %{REQUEST_URI} !^/repos/repos.fcgi [NC]
RewriteRule (.*) /repos/repos.fcgi/$1 [L,R=301]

RewriteCond %{REQUEST_URI} !^/repos [NC]
RewriteCond %{REQUEST_URI} !^/index.fcgi [NC]
RewriteRule (.*) /index.fcgi/$1 [L,R=301]