$ git clone -n https://src.fedoraproject.org/rpms/perl-JSON-RPC.git /var/lib/mock/f39-build-1437710-32158/root/chroot_tmpdir/scmroot/perl-JSON-RPC
Cloning into '/var/lib/mock/f39-build-1437710-32158/root/chroot_tmpdir/scmroot/perl-JSON-RPC'...
$ git fetch origin 877e7b82ebec8f2ce9bafe371b355036904a9b5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-JSON-RPC
 * [new ref]         877e7b82ebec8f2ce9bafe371b355036904a9b5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 877e7b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild