Composer - adding git repository without composer.json

Question

I try to add repository from github (designmodo/Flat-UI), play with config and get errors No valid composer.json was found in any branch or..., Your requirements could not be resolved to an installable set of packages., The requested package designmodo/flat-ui could not be found in any version

What mistake I made in config:

"repositories": {
   "flat-ui": {
     "type": "package",
     "package": {
       "name": "designmodo/Flat-UI", 
       "version": "1.3.0", // Don't know is it important? Where get this number in repo?
       "source": {
         "url": "https://github.com/designmodo/Flat-UI",
         "type": "git",
         "reference": "dev-master" // reference is branch name? 
       }
     }
   }
 },

 "require": {
   "twbs/bootstrap-sass": "~3.2",
   "designmodo/Flat-UI": "dev-master" // branch again (/minimum-stability?)
 },

At some point composer download package but return error (i don't know when he did it, I lookup in vendor folder and designmodo folder was be there).

Answer 1

Problem solved. Play around and changed reference to master and version to any * in "designmodo/Flat-UI": "*" section. After that composer download package via git and update composer.lock without problems. Should work for any github repos.

Working config:

{
    "repositories": {
      "flat-ui": {
        "type": "package",
        "package": {
          "name": "designmodo/Flat-UI",
          "version": "1.3.0",
          "source": {
            "url": "https://github.com/designmodo/Flat-UI",
            "type": "git",
            "reference": "master"
          }
        }
      }
    },
    "require": {
        "twbs/bootstrap-sass": "~3.2",
        "designmodo/Flat-UI": "*"
    },
}

https://getcomposer.org/doc/05-repositories.md