Update cheatsheets

hub

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# hub
+
+> A wrapper for Git that adds commands for working with GitHub-based projects.
+> If set up as instructed by `hub alias`, one can use `git` to run `hub` commands.
+> More information: <https://hub.github.com>.
+
+- Clone a repository using its slug (owners can omit the username):
+
+`hub clone {{username}}/{{repo_name}}`
+
+- Create a fork of the current repository (cloned from another user) under your GitHub profile:
+
+`hub fork`
+
+- Push the current local branch to GitHub and create a PR for it in the original repository:
+
+`hub push {{remote_name}} && hub pull-request`
+
+- Create a PR of the current (already pushed) branch, reusing the message from the first commit:
+
+`hub pull-request --no-edit`
+
+- Create a new branch with the contents of a pull request and switch to it:
+
+`hub pr checkout {{pr_number}}`
+
+- Upload the current (local-only) repository to your GitHub account:
+
+`hub create`
+
+- Fetch Git objects from upstream and update local branches:
+
+`hub sync`