git-assembler 1.5 was just released. Git flags can now directly be passed onto the underlying merge and rebase operations, allowing the developer to use different merge strategies or control fast-forward settings on a branch-by-branch basis.
git-assembler can perform automatic merge and rebase operations following a simple declarative script. Like "make", but for branches. It can be used to create branches which are a combination of patches using various strategies and keep it always updated. Useful for testing, CI or custom branch organization workflows like a generalized stgit/topgit.
Documentation and links are available at:
https://www.thregr.org/~wavexx/software/git-assembler/
The source itself:
https://gitlab.com/wavexx/git-assembler