当文件夹结构发生变化时比较提交之间的文件

Compare file between commits when folder structure has changed

问题:
当文件夹结构在 commit_hash_1commit_hash_2 之间发生变化时,如何 git diff 特定文件?

我知道的:
我可以 git diff 两次提交之间的文件:

git diff commit_hash_1 commit_hash_2 folder/file.ext

尝试的解决方案:
1. 我猜是这样的:

git diff commit_hash_1:/folder/file.ext commit_hash_2:/new_folder/file.ext

但这行不通;它给了我:

fatal: Path '/new_folder/file.ext' does not exist in 'commit_hash_2'

2. 所以另一个选项是:

git diff commit_hash_1 commit_hash_2 new_folder/file.ext

但这会开始 commit_hash_2 file.ext/dev/null 之间的比较。

尝试的解决方案几乎是正确的,但那些开始的斜杠是错误的。尝试:

git diff commit_hash_1:folder/file.ext commit_hash_2:new_folder/file.ext

感谢@dlsso 让我走上正轨。