$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-ASN.git /var/lib/mock/f45-build-25248-610/root/chroot_tmpdir/scmroot/perl-Net-ASN
Cloning into '/var/lib/mock/f45-build-25248-610/root/chroot_tmpdir/scmroot/perl-Net-ASN'...
$ git fetch origin ea21f08e29cbbb5709d600b5e7f5b4822cad8fcd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-ASN
 * [new ref]         ea21f08e29cbbb5709d600b5e7f5b4822cad8fcd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea21f08 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild