Update cheatsheets

git-obliterate

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git obliterate
+
+> Delete files and erase their history from a Git repository.
+> Part of `git-extras`.
+> More information: <https://github.com/tj/git-extras/blob/master/Commands.md#git-obliterate>.
+
+- Erase the existence of specific files:
+
+`git obliterate {{file_1 file_2 ...}}`
+
+- Erase the existence of specific files between 2 commits:
+
+`git obliterate {{file_1 file_2 ...}} -- {{commit_hash_1}}..{{commit_hash_2}}`