git-help.txt

git config -l, --list // list config options from system, global and local config files
git config -l --show-origin
git config --global user.name "username" // set user.name in $HOME/.gitconfig
git config --system user.email email@mail.com // set user.email in git/mingw/etc/gitconfig
git config --system --unset user.email // unset user.email in git/mingw/etc/gitconfig
git config --system --remove-section user
git config --global alias.lo "log --oneline --graph"

git init [<proj_dir>] // init repo in proj_dir or cwd (create $GIT_DIR=.git subdir)
git init --template <templ_dir> // templ_dir must be absolute path
git init --separate-git-dir <gitdir> // gitdir can be relative to cwd
git init --shared[=<permissions>]
git init --bare [<proj_dir.git>] // repo only for push/pull (no gitdir)
git init -q, --quiet

git clone <src_repo> [<dst_proj_dir>]
git clone --depth <depth> // 1 min depth
git clone --progress

git show <commit || tag> // show info and diff for commit
git reflog // log of actions
git show-ref // list .git/refs and packed_refs
git log <commit | branch> // list commits
git log -g, --walk-reflogs [<log file from .git/logs>] // log for commits from git reflog
git log -p // git show for each commit listed
git log --oneline // shorthand for git log --pretty=oneline --abbrev-commit
git log --oneline -- <filepath> // list all commits that have changes on file
git log --graph

git status // show changes between working-tree (proj_dir), index (staging area) and HEAD (current checked out commit)

git diff // show diff between workiking-tree and index
git diff HEAD // show diff between workiking-tree and HEAD
git diff --cached <named_commit> // show diff between index and named_commit or HEAD

git add <glob || file || dir> // add files to index (staging area)
git add -A, --all // stage all files (tracked or untracked) in working tree
git add -u, --update // stage all changed tracked files in working tree
git add -f, --force // forcefully add ignored files
git add -p, --patch // select hunks interactively?

git rm <file> // remove file from working tree and index (must be in index)
git rm --cached <file> // remove file from index (unstage)
git rm --ignore-unmatch <file> // don't error if file doesn't exist

git reset // same as git reset --mixed HEAD (reset index to HEAD)
git reset --soft <named_commit> // reset HEAD to named_commit (eg HEAD~1 for prev commit)
git reset --mixed <named_commit> // default mode, reset HEAD and index to named_commit
git reset --hard <named_commit> // reset HEAD, index and working tree to named_commit
git reset -- <file> // reset only file (doesn't work with --hard, checkout -- file instead)

git commit // copy 
git commit -a, --all // auto add all tracked (changed/deleted) files, do nothing for untracked
git commit --amend // redo last commit (amended commit is lost)

git branch // list branches
git branch <new_branch_name> <with_tip_at_this_commit> // create branch
git branch -d, --delete // delete branch (must not be checked-out), keeps subbranches
git branch -D // alias for --delete --force, delete even if there are unmerged changes
git branch -f <branch_name> <new_tip> // move branch

git merge <to_branch> // merge current branch with to_branch
git merge <to_br> --no-ff -m <message> // non fast-forward merge, create commit for merging
git merge --no-ff --no-commit <to_branch> // test for conflicts, don't do real merge

git checkout <branch_name || commit_name || tag_name> // set state as if right after commit
git checkout <commit> -- <file> // revert single file
git checkout --detach <branch> // detach head from branch tip
git checkout --force // throw away changed files
git checkout -b <new_branch>

git tag // list tags
git tag -l "v2.*" // list only v2 tags
git tag <tagname> <commit_name> // add lightweight tag (just commit name alias) to commit
git tag -a <tagname> -m <message> // add annotated tag (message necessary) to HEAD



git remote -v // list named remote repos with urls
git remote add <name> <url> // add remote to this repo
git remote show <name>

git fetch origin // fetch branches specified in .git/config
git fetch origin master:refs/remotes/origin/mymaster // fetch master from origin to mymaster
git fetch origin +master:refs/remotes/origin/mymaster // fetch master from origin to mymaster even if it isn't a fast-forward

git push <remote || url> <branch_name | tagname> // push branch to remote
git push -f, --force // overwrite remote
git push <remote> --delete <branch> // delete branch
git push origin :topic // delete branch named 'topic' (<src>:<dst>)
git push -u origin master // for the first push, if master doesn't exist at origin (adds [ branch "master" ] ... to .git/config)
git push <remote> --tags // push all tags

git pull // fetch and try to merge


git rev-list --objects --all // list all reachable objs (doesn't list objs referenced in index)
git fsck --unreachable // list unreachable objs (doesn't list objs referenced in index, or reset commits)
git fsck --full
git update-ref -d refs/original/HEAD // delete ref
git reflog expire --expire=now --all // empties files at .git/logs, !note expire --expire
git reflog expire --expire=1.minute refs/heads/master // expire entries older than 1min at master branch reflog
git prune --expire now // remove unreachable objects
git gc // pack objects
git gc --prune=now // remove dangling objects and pack
git ls-tree <tree-ish> // list files in commit
git ls-files --cached | --deleted | ...// info about files in index and working tree
git hash-object -w <file> // write obj from file
git hash-object -w --stdin // write obj from stdin
git cat-file -p <obj_hash> // print content
git cat-file -t <obj_hash> // show type
git cat-file -p master^{tree}

git count-objects -v
git verify-pack -v .git/objects/pack/pack-xxxx.idx // show objs in pack (hash type content_size obj_size? offset_in_pack?)
cat xxx.pack | git unpack-objects // .pack has to be outside .git/objects/pack

git filter-branch --index-filter "git rm --ignore-unmatch --cached file.txt" -- <prefrom_commit>..<to_commit> // remove file.txt from history in commits starting from after 'prefrom' to 'to', moves head to new to_commit, doesn't move branch pointer. References to old commits are still in reflog and refs/original, so they have to be removed before git gc --prune=now