Add link to repo file in the wiki

Hello,
I'm writing a wiki in this repository:
https://bitbucket.org/nsegata/graphlan/\\
I tried to link in the wiki some files and directories present in the
repository (e.g. "readme.txt" and "examples" directory).
Unfortunately the URL link to the file has something like an hash that, I think, is
related to the last commit.
I don't want to keep a copy of the repository inside the "wiki" folder in
order to link things because, in that case, I have to update the same
repository in two different locations.

I was wondering if there is a way to link files and directories of the
repository. If exists something like an automatic link that point to the
last commit, without change the URL of the source file.

Thank you,
Francesco Asnicar
Master Student in Computer Science @ University of Trento