fork is a clone. It emerged because you cannot push to others’ copies without their permission. They make a copy of it for you (fork), where you will have write permission as well.
Step 1: Login your account and go to your project
Step 2: Select your project and click on fork
if you get the message No available namespaces to fork the project.
then click on groups->yourgroup from the menu and create a new group
Now, again come to project and click on fork than you can select fork now you can check here groups are avialble
copy of project we can merge with original project
Now click on merge request(Side bar section) you can check in sidebar
click on new marge request here sourse and target branch 