$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Ngram.git /var/lib/mock/f45-build-27026-620/root/chroot_tmpdir/scmroot/perl-Text-Ngram
Cloning into '/var/lib/mock/f45-build-27026-620/root/chroot_tmpdir/scmroot/perl-Text-Ngram'...
$ git fetch origin 61e3b5aa89e198809be5ae11e35918a0646cff44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Ngram
 * [new ref]         61e3b5aa89e198809be5ae11e35918a0646cff44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61e3b5a Perl 5.44 rebuild