$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-Simple.git /var/lib/mock/f39-build-1437345-32130/root/chroot_tmpdir/scmroot/perl-Authen-Simple
Cloning into '/var/lib/mock/f39-build-1437345-32130/root/chroot_tmpdir/scmroot/perl-Authen-Simple'...
$ git fetch origin 3bd6e7f5cf71aa55955d68b9ed5f239c83e7fb1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-Simple
 * [new ref]         3bd6e7f5cf71aa55955d68b9ed5f239c83e7fb1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bd6e7f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild