$ git clone -n https://src.fedoraproject.org/rpms/rust-nalgebra.git /var/lib/mock/f38-build-side-43-rust-devel-1397327-31052/root/chroot_tmpdir/scmroot/rust-nalgebra
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397327-31052/root/chroot_tmpdir/scmroot/rust-nalgebra'...
$ git fetch origin a185c6bc988a332f17a7e153c23f180b58e8f969:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nalgebra
 * [new ref]         a185c6bc988a332f17a7e153c23f180b58e8f969 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a185c6b Update to version 0.32.3