$ git clone -n https://src.fedoraproject.org/rpms/perl-constant-boolean.git /var/lib/mock/f45-build-27658-625/root/chroot_tmpdir/scmroot/perl-constant-boolean
Cloning into '/var/lib/mock/f45-build-27658-625/root/chroot_tmpdir/scmroot/perl-constant-boolean'...
$ git fetch origin ed948dcc8618a31bdfc407c61415e5886b3d3144:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-constant-boolean
 * [new ref]         ed948dcc8618a31bdfc407c61415e5886b3d3144 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed948dc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild