$ git clone -n https://src.fedoraproject.org/rpms/perl-HTTP-Server-Simple.git /var/lib/mock/f45-build-24034-601/root/chroot_tmpdir/scmroot/perl-HTTP-Server-Simple
Cloning into '/var/lib/mock/f45-build-24034-601/root/chroot_tmpdir/scmroot/perl-HTTP-Server-Simple'...
$ git fetch origin 291571e62410cb34dec47a607ae3220efc2951ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTTP-Server-Simple
 * [new ref]         291571e62410cb34dec47a607ae3220efc2951ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 291571e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild