$ git clone -n https://src.fedoraproject.org/rpms/anarch.git /var/lib/mock/f39-build-1624885-39109/root/chroot_tmpdir/scmroot/anarch
Cloning into '/var/lib/mock/f39-build-1624885-39109/root/chroot_tmpdir/scmroot/anarch'...
$ git fetch origin 0d8beb572ec893fa3a3dfd3a0dd407f921c4c345:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/anarch
 * [new ref]         0d8beb572ec893fa3a3dfd3a0dd407f921c4c345 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d8beb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild