$ git clone -n https://src.fedoraproject.org/rpms/rust-sized-chunks.git /var/lib/mock/f39-build-1489019-34501/root/chroot_tmpdir/scmroot/rust-sized-chunks
Cloning into '/var/lib/mock/f39-build-1489019-34501/root/chroot_tmpdir/scmroot/rust-sized-chunks'...
$ git fetch origin b2a05ebc191b84df69fec70aa9779c27373bb148:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sized-chunks
 * [new ref]         b2a05ebc191b84df69fec70aa9779c27373bb148 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2a05eb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild