$ git clone -n https://src.fedoraproject.org/rpms/perl-constant-boolean.git /var/lib/mock/f40-build-2016016-46143/root/chroot_tmpdir/scmroot/perl-constant-boolean
Cloning into '/var/lib/mock/f40-build-2016016-46143/root/chroot_tmpdir/scmroot/perl-constant-boolean'...
$ git fetch origin d8b29f7296ea90eff84a0013a52d88d3c9389fcc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-constant-boolean
 * [new ref]         d8b29f7296ea90eff84a0013a52d88d3c9389fcc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8b29f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild