Cryptic git commit error

I have checked out the project from private GitHub repo - I have the password and everytthing. But every time I try to commit I get this cryptic error:

Error executing git commit --only -F /private/var/folders/bs/zfry67p51_gflf6hqgzplv2xt80189/T/git-commit-msg-5921808149812071312.txt --author=dsedlacek -- web/js/definitions/jquery.d.ts web/js/libs/handlebars-v1.3.0.js web/css/icon....


Firstly the error doesn't really say what went wrong and secondly does anyone have an idea how to fix it?

Thanks!