We have the following branches in our repository: `v4.2` and `v5.0`. Each branch has two builds (for linux and windows).

When a PR is merged to the `v4.2` branch, the related webhook triggers all of the builds for both `v4.2` and `v5.0`:
`Testsv42_Linx64`
`Testsv42_Winx64`
`Testsv50_Linx64`
`Testsv50_Winx64`

This is how the `Testsv42_Linx64` build is configured. The rest of the builds are configured similarly.

Additional note: the v5.0 branch contains some commits from the v4.2 branch - the v4.2 branch is merged to v5.0 once in a while.