Maven repository that sometimes works - maven

Question

I hosted a java project on github.
The project is located here.
The project is really just a java library, and I wanted to create a maven repository for it. Because this is tricky, I followed a guide which explained me which project structure to follow. He applies a trick: create a 2nd branch named "repository". As you can see the jar files are in there.
That all went well, I made my first build, and then I created a java "Hello World" project to test if I could use this new maven dependency. So, I created a pom file with a dependency:
<dependency>
<groupId>brugo</groupId>
<artifactId>brugo</artifactId>
<version>0.1.0</version>
</dependency>
And to tell maven where to find this dependency, I added this one:
<repositories>
<repository>
<id>brugo</id>
<url>https://github.com/brugo/brugo/raw/repository/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
</snapshots>
</repository>
</repositories>
The good thing: sometimes it works.
The bad thing: sometimes it does not work.
And I am trying to find out what could be wrong. This is what IntelliJ looks like when things go wrong:
And I've seen this error message showing up:
[ERROR] Failed to execute goal on project xxx:
Could not resolve dependencies for project xxx:
Could not find artifact brugo:brugo:jar:0.1.0 in
brugo (https://github.com/brugo/brugo/raw/repository/) -> [Help 1]
I tried an mvn clean install -U several times, but without success.
I had the same problem on a different computer yesterday, then suddenly I got it to work without really knowing how.

Answer 1

Special thanks to #wargre for pointing me in this direction.
It's indeed easier (and more convenient) to set it up to be directly in the central maven repository.
http://central.sonatype.org/pages/ossrh-guide.html explains all the required steps. Here follows a summary.
First release:
Create a JIRA account and a project
Add plugins to the pom.xml file
Add more meta to the pom.xml
Download/install GPG and create keys
Create a settings.xml which contains your credentials.
Run mvn clean deploy
Verify the result in the staging repository
Release when happy, drop and retry while unsatisfied.
Post a comments on the JIRA ticket
Admire the result in the maven central repository.
Consecutive releases:
Update the version number in pom.xml
Run mvn clean deploy
Release (manual/automatic)