$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-Twitter.git /var/lib/mock/f41-build-side-1-2921920-34952/root/chroot_tmpdir/scmroot/perl-Net-Twitter
Cloning into '/var/lib/mock/f41-build-side-1-2921920-34952/root/chroot_tmpdir/scmroot/perl-Net-Twitter'...
$ git fetch origin 1ebc81d4a3920ac329a784d9e2d0a0118563ed38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-Twitter
 * [new ref]         1ebc81d4a3920ac329a784d9e2d0a0118563ed38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ebc81d convert GPL+ or Artistic license to SPDX