$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-ISA.git /var/lib/mock/f45-build-22354-591/root/chroot_tmpdir/scmroot/perl-Class-ISA
Cloning into '/var/lib/mock/f45-build-22354-591/root/chroot_tmpdir/scmroot/perl-Class-ISA'...
$ git fetch origin 6002e31114e00e423abcfef34169c5a3c2c932fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-ISA
 * [new ref]         6002e31114e00e423abcfef34169c5a3c2c932fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6002e31 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild