$ git clone -n https://src.fedoraproject.org/rpms/perl-MIME-EncWords.git /var/lib/mock/f40-build-2626829-65307/root/chroot_tmpdir/scmroot/perl-MIME-EncWords
Cloning into '/var/lib/mock/f40-build-2626829-65307/root/chroot_tmpdir/scmroot/perl-MIME-EncWords'...
$ git fetch origin 6130a9691a83570871a72e3f6e11d628db9b6f7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MIME-EncWords
 * [new ref]         6130a9691a83570871a72e3f6e11d628db9b6f7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6130a96 Update to 1.015.0 (RHBZ#2263833)