$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-engine.git /var/lib/mock/f38-build-side-43-rust-devel-1412669-31443/root/chroot_tmpdir/scmroot/rust-nu-engine
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412669-31443/root/chroot_tmpdir/scmroot/rust-nu-engine'...
$ git fetch origin 3304b2b1c6aba1728b57ab6ef585a957a84f3d43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-engine
 * [new ref]         3304b2b1c6aba1728b57ab6ef585a957a84f3d43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3304b2b Update to 0.80.0