$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-TimeZone.git /var/lib/mock/f41-build-816877-150476/root/chroot_tmpdir/scmroot/perl-DateTime-TimeZone
Cloning into '/var/lib/mock/f41-build-816877-150476/root/chroot_tmpdir/scmroot/perl-DateTime-TimeZone'...
$ git fetch origin c48d690958a4c850e05c70b4b73783372a7b6155:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-TimeZone
 * [new ref]         c48d690958a4c850e05c70b4b73783372a7b6155 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c48d690 Perl 5.40 re-rebuild of bootstrapped packages