如何执行原子指令集？

Question

在下面的代码中：

    print "Checkout report:"
    print "Commit hash is $treeMapData.GIT_COMMIT"
    print "Branch is $treeMapData.GIT_BRANCH"

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在执行上述指令的过程中，背景线程被交错

Checkout report:
[Pipeline] echo
Commit hash is 111111111111111111111111111
[Pipeline] echo
Branch is origin/develop
[Pipeline] }

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如何使指令集自动执行？