$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-String.git /var/lib/mock/f39-build-1439838-32289/root/chroot_tmpdir/scmroot/perl-Unicode-String
Cloning into '/var/lib/mock/f39-build-1439838-32289/root/chroot_tmpdir/scmroot/perl-Unicode-String'...
$ git fetch origin 11ab6379661c30630553c633ad4455fa22598441:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-String
 * [new ref]         11ab6379661c30630553c633ad4455fa22598441 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11ab637 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild