Composer fails update on a require from git repository where branch name starts with digit and has a period - json

Question

I've forked the repository at https://github.com/laravel-doctrine/orm and I'm trying to add it as a require in a composer.json script.
My json (the relevant bits) is as follows:
"repositories": [
{
"type": "git",
"url": "https://github.com/MyGHAccount/laravel-doctrine.git"
},
.
.
.
"require": {
.
.
.
"laravel-doctrine/orm": "dev-1.2"
Composer generates the following error:
Your requirements could not be resolved to an installable set of packages.
Problem 1
- The requested package laravel-doctrine/orm could not be found in any version, there may be a typo in the package name.
Potential causes:
- A typo in the package name
- The package is not available in a stable-enough version according to your minimum-stability setting see
https://getcomposer.org/doc/04-schema.md#minimum-stability for more
details.
Read https://getcomposer.org/doc/articles/troubleshooting.md for
further common problems.
The actual branch name from https://github.com/laravel-doctrine/orm is 1.2.
This SO question leads me to believe that Composer has no problem with periods in the branch name, but can't deal with branches starting with a digit.
I have found a workaround to this in that I simply renamed my branch on GitHub to master; I just want to know if there's a proper way to do this with Composer without the workaround.

Answer 1

Issue 1
This doesn't make sense: https://github.com/MyGHAccount/laravel-doctrine/orm.git.
In case you forked the original repository, the fork has another URL and not the one you posted here.
There are only two levels: github.com/vendor/repo.
It's possibly https://github.com/MyGHAccount/orm.git.
Issue 2
You're not using Composers verbose mode. Please use Composer's verbose mode (-vvv) and let Composer tell you the package resolution story and it's problems. You might be able to figure the issue out yourself.
Issue 3
Before - using packagist package:
composer.json:
{
"require": {
"laravel-doctrine/orm": "1.2"
}
}
After - overriding with your own fork:
composer.json:
{
"repositories": [
{
"type": "git",
"url": "https://github.com/your-account/orm"
}
],
"require": {
"laravel-doctrine/orm": "1.2"
}
}