$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-plugin.git /var/lib/mock/f39-build-1870148-42648/root/chroot_tmpdir/scmroot/rust-nu-plugin
Cloning into '/var/lib/mock/f39-build-1870148-42648/root/chroot_tmpdir/scmroot/rust-nu-plugin'...
$ git fetch origin a06eb2976ac50e37830de47e1f2d86ef658ea87c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-plugin
 * [new ref]         a06eb2976ac50e37830de47e1f2d86ef658ea87c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a06eb29 Update to 0.86.0