$ git clone -n https://src.fedoraproject.org/rpms/perl-File-ReadBackwards.git /var/lib/mock/f39-build-1436215-32049/root/chroot_tmpdir/scmroot/perl-File-ReadBackwards
Cloning into '/var/lib/mock/f39-build-1436215-32049/root/chroot_tmpdir/scmroot/perl-File-ReadBackwards'...
$ git fetch origin aa076dcb67aa6b7cde9c7a6c0069170b25c1f9d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-ReadBackwards
 * [new ref]         aa076dcb67aa6b7cde9c7a6c0069170b25c1f9d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa076dc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild