$ git clone -n https://src.fedoraproject.org/rpms/perl-Guard.git /var/lib/mock/f45-build-23842-599/root/chroot_tmpdir/scmroot/perl-Guard
Cloning into '/var/lib/mock/f45-build-23842-599/root/chroot_tmpdir/scmroot/perl-Guard'...
$ git fetch origin ca74576055ac54d1206d09e03c9c3c223b7062f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Guard
 * [new ref]         ca74576055ac54d1206d09e03c9c3c223b7062f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca74576 Perl 5.44 rebuild