Git comes with a massive bunch of (sub)commands and even if you're dealing with git on a daily basis, you might not always remember every single one you need along the way. Having bash completion for git is already a good start (type
git, a space and then tab), but this is only a subset with the higher level commands.
If you also need lower level commands (or don't have bash completion), try
git help --all
which will render a list of available commands, like:
available git commands in '/opt/local/libexec/git-core' ------------------------------------------------------- add fast-import merge-recursive reset add--interactive fetch merge-resolve rev-list am fetch-pack merge-subtree rev-parse annotate filter-branch merge-tree revert apply fmt-merge-msg mergetool rm archimport for-each-ref mktag send-email archive format-patch mktree send-pack bisect fsck mv sh-i18n--envsubst bisect--helper fsck-objects name-rev shell blame gc notes shortlog branch get-tar-commit-id pack-objects show bundle grep pack-redundant show-branch cat-file gui pack-refs show-index check-attr gui--askpass patch-id show-ref check-ref-format hash-object peek-remote stage checkout help prune stash checkout-index http-backend prune-packed status cherry http-fetch pull stripspace cherry-pick http-push push submodule citool imap-send quiltimport svn clean index-pack read-tree symbolic-ref clone init rebase tag commit init-db receive-pack tar-tree commit-tree instaweb reflog unpack-file config log relink unpack-objects count-objects lost-found remote update-index cvsexportcommit ls-files remote-ext update-ref cvsimport ls-remote remote-fd update-server-info cvsserver ls-tree remote-ftp upload-archive daemon mailinfo remote-ftps upload-pack describe mailsplit remote-http var diff merge remote-https verify-pack diff-files merge-base remote-testgit verify-tag diff-index merge-file repack web--browse diff-tree merge-index replace whatchanged difftool merge-octopus repo-config write-tree difftool--helper merge-one-file request-pull fast-export merge-ours rerere