$ git clone -n https://src.fedoraproject.org/rpms/perl-Time-y2038.git /var/lib/mock/f45-build-27123-621/root/chroot_tmpdir/scmroot/perl-Time-y2038
Cloning into '/var/lib/mock/f45-build-27123-621/root/chroot_tmpdir/scmroot/perl-Time-y2038'...
$ git fetch origin 36c0fc114245a561292fee1aa600a0f6887345b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Time-y2038
 * [new ref]         36c0fc114245a561292fee1aa600a0f6887345b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36c0fc1 Perl 5.44 rebuild