$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_isaac.git /var/lib/mock/f38-build-side-43-rust-devel-1418116-31459/root/chroot_tmpdir/scmroot/rust-rand_isaac
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418116-31459/root/chroot_tmpdir/scmroot/rust-rand_isaac'...
$ git fetch origin fbc7f4acba38d3fca259b6174e0810d5c570b898:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_isaac
 * [new ref]         fbc7f4acba38d3fca259b6174e0810d5c570b898 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbc7f4a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild