$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Zstd.git /var/lib/mock/f45-build-22459-591/root/chroot_tmpdir/scmroot/perl-Compress-Zstd
Cloning into '/var/lib/mock/f45-build-22459-591/root/chroot_tmpdir/scmroot/perl-Compress-Zstd'...
$ git fetch origin 396365363941ecf1a0cc7dd1a45f26be50550760:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Zstd
 * [new ref]         396365363941ecf1a0cc7dd1a45f26be50550760 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3963653 Perl 5.44 rebuild