$ git clone -n https://src.fedoraproject.org/rpms/rust-nalgebra.git /var/lib/mock/f45-build-43292-801/root/chroot_tmpdir/scmroot/rust-nalgebra
Cloning into '/var/lib/mock/f45-build-43292-801/root/chroot_tmpdir/scmroot/rust-nalgebra'...
$ git fetch origin 1e8a53fc59de815d5400792a2276b81bab686931:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nalgebra
 * [new ref]         1e8a53fc59de815d5400792a2276b81bab686931 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e8a53f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild