@jenniferplusplus and if you still want to do it, there's features to do it in a supported way. submodules is one option, subtrees are another.
Notices by fsmaxb@mastodon.cloud
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fsmaxb@mastodon.cloud's status on Saturday, 27-Jan-2024 23:57:48 JST FSMaxB -
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fsmaxb@mastodon.cloud's status on Tuesday, 05-Dec-2023 19:45:52 JST FSMaxB @mjg59 Borg backup and restic are two.
There's also pika backup, which is a GUI frontend for Borg.
Of the tools mentioned above, I have only used borg directly. Have been using it successfully for years at this point.