$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-plugin.git /var/lib/mock/f41-build-1557856-23982/root/chroot_tmpdir/scmroot/rust-nu-plugin
Cloning into '/var/lib/mock/f41-build-1557856-23982/root/chroot_tmpdir/scmroot/rust-nu-plugin'...
$ git fetch origin 8e2c529e56ee5d6feda948a05d226d80267bc0bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-plugin
 * [new ref]         8e2c529e56ee5d6feda948a05d226d80267bc0bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e2c529 Update to 0.91.0 (rhbz#2257509)