For global settings.
git config --global --edit
For local settings for individual projects.
git config --local --edit
one-liner to edit user and email
git config --local user.name "NoSkillGuy" && git config --local user.email "NoSkillGuy@gmail.com"
Other options available
usage: git config [<options>]
Config file location
--global use global config file
--system use system config file
--local use repository config file
-f, --file <file> use given config file
--blob <blob-id> read config from given blob object
Action
--get get value: name [value-regex]
--get-all get all values: key [value-regex]
--get-regexp get values for regexp: name-regex [value-regex]
--get-urlmatch get value specific for the URL: section[.var] URL
--replace-all replace all matching variables: name value [value_regex]
--add add a new variable: name value
--unset remove a variable: name [value-regex]
--unset-all remove all matches: name [value-regex]
--rename-section rename section: old-name new-name
--remove-section remove a section: name
-l, --list list all
-e, --edit open an editor
--get-color find the color configured: slot [default]
--get-colorbool find the color setting: slot [stdout-is-tty]
Type
--bool value is "true" or "false"
--int value is decimal number
--bool-or-int value is --bool or --int
--path value is a path (file or directory name)
Other
-z, --null terminate values with NUL byte
--name-only show variable names only
--includes respect include directives on lookup
--show-origin show origin of config (file, standard input, blob, command line)