$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-MapUTF8.git /var/lib/mock/f45-build-27337-622/root/chroot_tmpdir/scmroot/perl-Unicode-MapUTF8
Cloning into '/var/lib/mock/f45-build-27337-622/root/chroot_tmpdir/scmroot/perl-Unicode-MapUTF8'...
$ git fetch origin ddf4c56f59e33cb3a4ab7831b48978922551d7b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-MapUTF8
 * [new ref]         ddf4c56f59e33cb3a4ab7831b48978922551d7b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddf4c56 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild