$ git clone -n https://src.fedoraproject.org/rpms/perl-MIME-EncWords.git /var/lib/mock/f45-build-24587-604/root/chroot_tmpdir/scmroot/perl-MIME-EncWords
Cloning into '/var/lib/mock/f45-build-24587-604/root/chroot_tmpdir/scmroot/perl-MIME-EncWords'...
$ git fetch origin 721fb868cd2c29e2d260d704742f9fc26a774432:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MIME-EncWords
 * [new ref]         721fb868cd2c29e2d260d704742f9fc26a774432 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 721fb86 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild