$ git clone -n https://src.fedoraproject.org/rpms/perl-utf8-all.git /var/lib/mock/f45-build-27861-626/root/chroot_tmpdir/scmroot/perl-utf8-all
Cloning into '/var/lib/mock/f45-build-27861-626/root/chroot_tmpdir/scmroot/perl-utf8-all'...
$ git fetch origin 18449ed76c3474d1c925b611a0b5575de7faa71c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-utf8-all
 * [new ref]         18449ed76c3474d1c925b611a0b5575de7faa71c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18449ed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild