https://www.google.com/search?q=dura is not mentioning word in Russian for me - and I set number of results per page to maximum.

https://en.wiktionary.org/wiki/dura is also not mentioning it.

See also https://news.ycombinator.com/item?id=29785163 - it is not so clear insult anyway.

And anyway, it would be anyway fitting for git using tool (git also has meaning as pejorative, typically male)