$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-UTF8.git /var/lib/mock/f41-build-816504-150225/root/chroot_tmpdir/scmroot/perl-Unicode-UTF8
Cloning into '/var/lib/mock/f41-build-816504-150225/root/chroot_tmpdir/scmroot/perl-Unicode-UTF8'...
$ git fetch origin 9b2c38839d6e453dc537f2298f7994155b4d9708:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-UTF8
 * [new ref]         9b2c38839d6e453dc537f2298f7994155b4d9708 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b2c388 Perl 5.40 rebuild