$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-protocol.git /var/lib/mock/f41-build-side-1-3001663-36470/root/chroot_tmpdir/scmroot/rust-nu-protocol
Cloning into '/var/lib/mock/f41-build-side-1-3001663-36470/root/chroot_tmpdir/scmroot/rust-nu-protocol'...
$ git fetch origin b0de3e5d713757ad3f47a785b88ba21f20cdfd4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-protocol
 * [new ref]         b0de3e5d713757ad3f47a785b88ba21f20cdfd4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0de3e5 Update rust-brotli to 7.0