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# Cleanup .git http://gcc.gnu.org/ml/gcc/2007-12/msg00165.html
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git repack -a -d --depth=250 --window=250
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# Reset to previous commit
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git reset HEAD~
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# Reset to commit
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git reset <commit hash> --hard
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# Checkout previous commit
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git checkout HEAD~
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# Create new branch
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git checkout -b
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# Revert changes to modified files (working changes)
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git reset --hard
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# New branch without git history & files
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git checkout --orphan
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# Show where git configs get defined
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git config --show-origin -l
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# Undo last commit but don't throw away changes
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git reset --soft HEAD^
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# List all git submodules
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git submodule--helper list
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# Pull from PR
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git pull origin pull/<issue ID>/head
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# List remote branches
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git branch -a
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# Delete branch
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git branch -d
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# Delete remote branch
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git push origin --delete
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# Force overwrite git repo. https://stackoverflow.com/questions/10510462/force-git-push-to-overwrite-remote-files
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git push -f <remote> <branch>
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# Reset to specific commit
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git reset --hard <commit>
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# Remove dir from git
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git rm --cached -r <dir>
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# Rename previous commit
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git commit --amend
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# Force push overwrite
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git push --force origin master
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# Hard reset a branch
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git reset --hard <branch-name>
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# Change remote. i.e. when making a fork of a clone to change upstream destination.
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git remote rename origin upstream; git remote rename nikitavoloboev origin
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# Change upstream to my name so it pushes there
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git branch --set-upstream-to nikitavoloboev/master master
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# Show changes between commits. Where f5352 and be73 are unique commit hashes.
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git diff f5352 be73
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# Update submodule
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git submodule update
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# Set PGP key for Git globally. <key> = fingerprint w/o spaces
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git config --global user.signingkey <key>
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# Delete commit from remote.
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# 1. Delete commit from local repo
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git reset --hard HEAD~1
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# 2. Delete commit from remote repo (can get commit using git log)
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git push -f origin last_known_good_commit:branch_name
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#
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# It is bad practice to rewrite history. Works best if no one has pushed commits on top of remote branch you want to rewrite history of.
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# 1. Rebase to commit you want to change (~1 means the first ancestor of the specified commit)
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git rebase -i <hash>~1
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# Can also do this
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git rebase -i HEAD~4 # where HEAD~4 = last 3 commits
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# 2. Rename pick to reword (in opened editor) & save/quit
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# 3. Change commit message in editor and save
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# 4. Overwrite and remove duplicate commits
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git push --force-with-lease
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​Quickly pull down PRs​
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git config --global --add alias.pr '!f() { git fetch -fu ${2:-upstream} refs/pull/$1/head:pr/$1 && git checkout pr/$1; }; f'
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git config --global --add alias.pr-clean '!git checkout master ; git for-each-ref refs/heads/pr/* --format="%(refname)" | while read ref ; do branch=${ref#refs/heads/} ; git branch -D $branch ; done'
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Change old commit message
Quickly pull down PRs
Change old commit message

​Quickly pull down PRs​

Quickly pull down PRs
