Questions about epel7 branch

[Brad Bell]

Recently, epel7 was added to the pkgdb
https://admin.fedoraproject.org/pkgdb/package/rpms/cppad/
Would someone please explain the following:
     1. Why is one branch called el6 and the next epel7 instead of el7 ?
     2. Why is there a .csvignore file in the initial epel7 branch ?
     3. Should I just copy or git merge files from the master branch to 
epel7 ?

After executing
     git show-ref
part of what I get is
     ab35867f883d9fa854d3f1ab78e90f4741fa9610 refs/heads/el6
     d9722dc5ceb9438715a9f519729556b1a80ad9ed refs/heads/epel7
     18cc6ccdeadc7c611ed33c0cd1c25cd375a3cd53 refs/heads/f22
     18cc6ccdeadc7c611ed33c0cd1c25cd375a3cd53 refs/heads/f23
     18cc6ccdeadc7c611ed33c0cd1c25cd375a3cd53 refs/heads/master

After executing
     fedpkg switch-branch master
     ls -a -l
part of what I get is
     -rw-rw-r--. 1 bradbell bradbell   20481 Jan  2 15:48 cppad.spec
     drwxrwxr-x. 8 bradbell bradbell    4096 Jan  2 15:48 .git
     -rw-rw-r--. 1 bradbell bradbell     536 Jan  2 15:48 .gitignore
     drwxrwxr-x. 3 bradbell bradbell    4096 Jan  1 08:09 results_cppad
     -rw-rw-r--. 1 bradbell bradbell      59 Jan  2 15:48 sources

After executing
     fedpkg switch-branch epel7
     ls -a -l
part of what I get is
     -rw-rw-r--. 1 bradbell bradbell       0 Jan  2 15:50 .cvsignore
     drwxrwxr-x. 8 bradbell bradbell    4096 Jan  2 15:50 .git
     -rw-rw-r--. 1 bradbell bradbell     770 Jan  2 15:50 Makefile
     drwxrwxr-x. 3 bradbell bradbell    4096 Jan  1 08:09 results_cppad
     -rw-rw-r--. 1 bradbell bradbell       0 Jan  2 15:50 sources