$ git clone -n https://src.fedoraproject.org/rpms/rust-nalgebra.git /var/lib/mock/f41-build-1108173-20093/root/chroot_tmpdir/scmroot/rust-nalgebra
Cloning into '/var/lib/mock/f41-build-1108173-20093/root/chroot_tmpdir/scmroot/rust-nalgebra'...
$ git fetch origin 581d98510f381e98d30180da0b54e8c51059e040:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nalgebra
 * [new ref]         581d98510f381e98d30180da0b54e8c51059e040 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 581d985 Update to version 0.32.6; Fixes RHBZ#2291466