$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_chacha.git /var/lib/mock/f38-build-side-43-rust-devel-1413077-31443/root/chroot_tmpdir/scmroot/rust-rand_chacha
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413077-31443/root/chroot_tmpdir/scmroot/rust-rand_chacha'...
$ git fetch origin 248423fdea9fd17bc4b090abc5143b92bf49763e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_chacha
 * [new ref]         248423fdea9fd17bc4b090abc5143b92bf49763e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 248423f Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild