$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-explore.git /var/lib/mock/f39-build-1778891-41532/root/chroot_tmpdir/scmroot/rust-nu-explore
Cloning into '/var/lib/mock/f39-build-1778891-41532/root/chroot_tmpdir/scmroot/rust-nu-explore'...
$ git fetch origin 298f7c7158b80369c7c7a09d90d7f5e3be27fed5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-explore
 * [new ref]         298f7c7158b80369c7c7a09d90d7f5e3be27fed5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 298f7c7 Update to 0.86.0