Azure Devops - Incomplete git branch name

Relating to feature git-commit-id/git-commit-id-maven-plugin#438

The predefined variables in Azure Devops can lead to incomplete branch names: According to
https://docs.microsoft.com/en-us/azure/devops/pipelines/build/variables?view=azure-devops&tabs=yaml#build-variables
you can see that BUILD_SOURCEBRANCHNAME only contains everything behind the last slash ('/'). This is incomplete however if the branchname itself contains a slash.
There is an issue on DevOps side, but it seems they are not changing that behavior
https://developercommunity.visualstudio.com/t/azure-devops-build-variable-buildsourcebranchname/519811

Maybe in this plugin at least we can? If so, the solution should probably be using BUILD_SOURCEBRANCH (complete name, including "refs/heads/") and statically removed the "refs/heads/" at the beginning

Steps to Reproduce

Have a branch with a slash in its name (e.g. "feature/iss123_description")

<plugin>
    <groupId>io.github.git-commit-id</groupId>
    <artifactId>git-commit-id-maven-plugin</artifactId>
        <configuration>
            <generateGitPropertiesFile>true</generateGitPropertiesFile>
            <generateGitPropertiesFilename>src/main/resources/git.properties</generateGitPropertiesFilename>
            <failOnNoGitDirectory>true</failOnNoGitDirectory>
            <dotGitDirectory>${project.basedir}../../../.git</dotGitDirectory>
            <verbose>true</verbose>
        </configuration>
</plugin>

Build the project in a AzureDevops Pipeline

Result: The git.properties file contains the branch as "git.branch=ss123_description"

Expected behavior

• The git.properties file should contain the branch as "git.branch=feature/iss123_description"

Additional context

For reproducibility please provide the following:

• plugin version 5.0.0
• java version: AdaptOpenJDK 11
• maven version 3.6
• OS version Ubuntu 20.04