git clone https://github.com/ORGANIZATION-NAME/PROJECT-NAME.git PROJECT-NAME-maven2
cd PROJECT-NAME-maven2
git branch maven2
git checkout maven2
rm -R ALL-PROJECT-FILES
run mvn install for jar creation (change GROUP, ARTIFACT-NAME, ARTIFACT-VERSION, PATH-TO-THE-JAR and PATH-TO-EXISTING-POM)
mvn install:install-file -DgroupId=GROUP -DartifactId=ARTIFACT-NAME -Dversion=ARTIFACT-VERSION \\
-Dfile=PATH-TO-THE-JAR -Dpackaging=jar -DlocalRepositoryPath=. -DcreateChecksum=true \\
-DpomFile=PATH-TO-EXISTING-POMUse -DgeneratePom=true instead of -DpomFile=PATH-TO-EXISTING-POM to create POM
git add .
git commit -m "Released version ARTIFACT-VERSION"
git push origin maven2
https://github.com/ORGANIZATION-NAME/PROJECT-NAME/raw/maven2
maven { url "https://github.com/ORGANIZATION-NAME/PROJECT-NAME/raw/maven2" }