Git plugin ver: 2.4.4

In jenkins job we configure Git plugin ->
Branches to build/Branch specifier: origin/ready/**

Developer pushes code to central git repository, which Jenkins check into 2 branches:
git push origin bugfix:sergey/bugfix
git push origin bugfix:ready/bugfix

When Jenkins job kicks in, it provides this output:

14:01:36 > git branch -a -v --no-abbrev --contains 24ef859065480d5ac965652cfce8a0dd959fd082 # timeout=10
14:01:36 Checking out Revision 24ef859065480d5ac965652cfce8a0dd959fd082 (origin/sergey/bugfix, origin/ready/bugfix)
..
..

14:01:36 HOME=/var/lib/jenkins
14:01:36 GIT_BRANCH=origin/sergey/bugfix
14:01:36 EXECUTOR_NUMBER=1

As you can see GIT_BRANCH got set to "origin/sergey/bugfix"
and this is wrong because we asked for branch to match origin/ready/**

This causes problems in our build process