$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-cli.git /var/lib/mock/f40-build-1093093-19973/root/chroot_tmpdir/scmroot/rust-nu-cli
Cloning into '/var/lib/mock/f40-build-1093093-19973/root/chroot_tmpdir/scmroot/rust-nu-cli'...
$ git fetch origin 72906a4712e725d28ec19e77ec9cf60a24fa6eab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-cli
 * [new ref]         72906a4712e725d28ec19e77ec9cf60a24fa6eab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72906a4 Update to 0.91.0 (rhbz#2267998)