$ git clone -n https://src.fedoraproject.org/rpms/perl-Cache-Memcached.git /var/lib/mock/f39-build-1437426-32134/root/chroot_tmpdir/scmroot/perl-Cache-Memcached
Cloning into '/var/lib/mock/f39-build-1437426-32134/root/chroot_tmpdir/scmroot/perl-Cache-Memcached'...
$ git fetch origin fb2d3d0037f8a1bddae81d225d959ba33ef3fb15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Cache-Memcached
 * [new ref]         fb2d3d0037f8a1bddae81d225d959ba33ef3fb15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb2d3d0 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild