After merging, branch is compared with itself instead of nearest single parent

[olessavluk]

Hello!

Consider the following branch structure (also available as screenshot ):

* 36f7689        (master) master stuff
| *   ada5e4c    (HEAD -> release/1.0) Merge branch 'feature/one' into release/1.0
| |\  
| | * 950e362    (feature/one) one
| |/  
| * fc556a4      1.0
|/  
* 313299f        add script
* c48d34f        init

Expected behavior:
When running plugin from ada5e4c * release/1.0 branch expected hash should be commit 313299f * add script

Actual behavior:
Suggest commit 950e362 * one

[olessavluk]

It's a bit hard to write generic plugin for this and the current one seem to be good as this is possible.

For anyone having similar issue I would recommend passing hashes manually, probably by taking them from CI merge request variables