Just seen this feature in the SubGit 3.2.4 release notes:
Support for svn.gitCommitMessage and svn.svnCommitMessage options that allow specifying message patterns used by SubGit while generating commit messages.
But i cannot find any example on the syntax. I want to do a one time import, so i guess i run
subgit configure SVN_REPO repo.git
then edit repo.git/subgit/config
and add gitCommitMessage
to the svn
section. But what are the variables/placeholders i can use?