$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-JSON.git /var/lib/mock/f39-build-1439603-32270/root/chroot_tmpdir/scmroot/perl-Test-JSON
Cloning into '/var/lib/mock/f39-build-1439603-32270/root/chroot_tmpdir/scmroot/perl-Test-JSON'...
$ git fetch origin f691f0731408a422bec95f16fa991d4adffa8b4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-JSON
 * [new ref]         f691f0731408a422bec95f16fa991d4adffa8b4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f691f07 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild