[JENKINS-20427] Build Parameter variable in branch name causes polling to detect false changes in GIT

Create a Job with a parameter:

branch

In GIT configuration set branch to:

${branch}

or

*/${branch}

This causes polling to keep detecting changes, even when there are none.

Everything is fine when I hardcode branch name like so:

*/master

---
Originally reported by m_a_r_k_y, imported from: Build Parameter variable in branch name causes polling to detect false changes in GIT

• status: Open
  
• priority: Major
  
• component(s): git-plugin
  
• resolution: Unresolved
  
• votes: 12
  
• watchers: 25
  
• imported: 2025-12-02
  

Raw content of original issue

Create a Job with a parameter:

branch


In GIT configuration set branch to:

${branch}

  or 

*/${branch}


This causes polling to keep detecting changes, even when there are none.


Everything is fine when I hardcode branch name like so:

*/master

environment

```
Jenkins 1.537

Jenkins GIT Plugin 2.0

Jenkins Multiple SCM Plugin 0.2
```