$ git clone -n https://src.fedoraproject.org/rpms/perl-constant-tiny.git /var/lib/mock/f45-build-27618-625/root/chroot_tmpdir/scmroot/perl-constant-tiny
Cloning into '/var/lib/mock/f45-build-27618-625/root/chroot_tmpdir/scmroot/perl-constant-tiny'...
$ git fetch origin fcce26a1c1e07c72083499c5c9c88a531701ad2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-constant-tiny
 * [new ref]         fcce26a1c1e07c72083499c5c9c88a531701ad2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcce26a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild