$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-TimeZone.git /var/lib/mock/f41-build-816643-150311/root/chroot_tmpdir/scmroot/perl-DateTime-TimeZone
Cloning into '/var/lib/mock/f41-build-816643-150311/root/chroot_tmpdir/scmroot/perl-DateTime-TimeZone'...
$ git fetch origin 682784c4c784df8517fa083bde015e535b34317d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-TimeZone
 * [new ref]         682784c4c784df8517fa083bde015e535b34317d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 682784c Perl 5.40 rebuild