$ git clone -n https://src.fedoraproject.org/rpms/Perlbal.git /var/lib/mock/f41-build-side-1-2817902-32992/root/chroot_tmpdir/scmroot/Perlbal
Cloning into '/var/lib/mock/f41-build-side-1-2817902-32992/root/chroot_tmpdir/scmroot/Perlbal'...
$ git fetch origin 210aebf2d731a99f411954ca3b953039d1906fc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Perlbal
 * [new ref]         210aebf2d731a99f411954ca3b953039d1906fc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 210aebf convert GPL+ or Artistic license to SPDX