The stash.pr plugin fails with modification check.

Modification check failed for material: [url=ssh://git@bitbucket.xxxxx.co.nz:1234/xx/xxxx-xxxx.git]31 Jul, 2018 at 11:23:12 Local Time

Interaction with plugin with id 'stash.pr' implementing 'scm' extension failed while requesting for 'latest-revisions-since'. Reason: [The plugin sent a response that could not be understood by Go. Plugin returned with code '500' and the following response: '"Unable to parse git-diff-tree output line: MMM\tapp/xxx/src/main/webapp/xxxx/xxx.jsp\nFrom output:\n a8fec4675bfdf4770aceafa6015abf475d3e6608\nMMM\tapp/xxx/src/main/webapp/xxxx/xxx.jsp"']

Looking into the code, it seems like MMM returned by git command is not understood by the plugin.