$ git clone -n https://src.fedoraproject.org/rpms/perl-multidimensional.git /var/lib/mock/f45-build-27710-625/root/chroot_tmpdir/scmroot/perl-multidimensional
Cloning into '/var/lib/mock/f45-build-27710-625/root/chroot_tmpdir/scmroot/perl-multidimensional'...
$ git fetch origin 6d09aecd99b585e077dd990987d8502812c7347f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-multidimensional
 * [new ref]         6d09aecd99b585e077dd990987d8502812c7347f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d09aec Perl 5.44 rebuild