rename gcm to gcmsg and stand for 'git commit -m'

plugins/git/git.plugin.zsh

@@ -22,7 +22,7 @@ alias gca='git commit -v -a'
 compdef _git gc=git-commit
 alias gca!='git commit -v -a --amend'
 compdef _git gca!=git-commit
-alias gcm='git commit -m'
+alias gcmsg='git commit -m'
 compdef _git gcm=git-commit
 alias gco='git checkout'
 compdef _git gco=git-checkout