$ git clone -n https://src.fedoraproject.org/rpms/rust-bytemuck_derive.git /var/lib/mock/f38-build-side-42-init-devel-1395363-31050/root/chroot_tmpdir/scmroot/rust-bytemuck_derive
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395363-31050/root/chroot_tmpdir/scmroot/rust-bytemuck_derive'...
$ git fetch origin 9184e2f3e9f30344ac067a3201b0a4a06225f74a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bytemuck_derive
 * [new ref]         9184e2f3e9f30344ac067a3201b0a4a06225f74a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9184e2f Update to version 1.5.0; Fixes RHBZ#2237539