$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-engine.git /var/lib/mock/f39-build-1651279-40489/root/chroot_tmpdir/scmroot/rust-nu-engine
Cloning into '/var/lib/mock/f39-build-1651279-40489/root/chroot_tmpdir/scmroot/rust-nu-engine'...
$ git fetch origin 48edb991c939030699cab18598a72e77a2a6ab87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-engine
 * [new ref]         48edb991c939030699cab18598a72e77a2a6ab87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48edb99 Update to 0.86.0