feat: separate commits in the destination repo PR request

**Current behaviour**: 
We make a PR to _Repo_A_ with 3 commits. 
As a result, a PR is created in _Repo_B_, but the number of commits is 1 - all commits are wrapped into one.

**Feature:**
To separate commits in the destination repo according to root repo commits.

**Expected behaviour:**
PR to _Repo_A_ with 3 commits -> PR to _Repo_B_ is created with 3 commits


