$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-CUPS.git /var/lib/mock/f45-build-25236-610/root/chroot_tmpdir/scmroot/perl-Net-CUPS
Cloning into '/var/lib/mock/f45-build-25236-610/root/chroot_tmpdir/scmroot/perl-Net-CUPS'...
$ git fetch origin 8f0cf8b7019255dd8c8dc5648ccf3aa8aed03d8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-CUPS
 * [new ref]         8f0cf8b7019255dd8c8dc5648ccf3aa8aed03d8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f0cf8b Perl 5.44 rebuild