The simple answer here is NO.
During the initial scan of the repositories to be monitored, BluBracket clones the repositories, scans them, creates a hash of each of the files (for later comparisons), and then deletes the repositories from the BluBracket servers. All of this happens within a few seconds depending on the repository size. BluBracket then saves specific metadata for easy reference - things like repository names, file names, contributor IDs, commit IDs and times, etc. BluBracket does not modify or store any actual code or secrets found in code on their servers.