$ git clone -n https://src.fedoraproject.org/rpms/rust-const-cstr.git /var/lib/mock/f38-build-side-43-rust-devel-1416891-31457/root/chroot_tmpdir/scmroot/rust-const-cstr
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416891-31457/root/chroot_tmpdir/scmroot/rust-const-cstr'...
$ git fetch origin 19d3b00d5a0b48f5d91ffa057b97168373f0ed4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-const-cstr
 * [new ref]         19d3b00d5a0b48f5d91ffa057b97168373f0ed4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19d3b00 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild