$ git clone -n https://src.fedoraproject.org/rpms/rust-downcast-rs.git /var/lib/mock/f38-build-side-43-rust-devel-1410815-31422/root/chroot_tmpdir/scmroot/rust-downcast-rs
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1410815-31422/root/chroot_tmpdir/scmroot/rust-downcast-rs'...
$ git fetch origin 61c5dbd9ef9950dd1c6c81795f297e131897f166:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-downcast-rs
 * [new ref]         61c5dbd9ef9950dd1c6c81795f297e131897f166 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61c5dbd Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild