$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-term-grid.git /var/lib/mock/f40-build-2642576-66459/root/chroot_tmpdir/scmroot/rust-nu-term-grid
Cloning into '/var/lib/mock/f40-build-2642576-66459/root/chroot_tmpdir/scmroot/rust-nu-term-grid'...
$ git fetch origin 15d9e9a798ab2d6f89874412084b4f2ad1af02e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-term-grid
 * [new ref]         15d9e9a798ab2d6f89874412084b4f2ad1af02e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15d9e9a Update to 0.91.0 (rhbz#2257515)