$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-cmd-lang.git /var/lib/mock/f39-build-1800682-41796/root/chroot_tmpdir/scmroot/rust-nu-cmd-lang
Cloning into '/var/lib/mock/f39-build-1800682-41796/root/chroot_tmpdir/scmroot/rust-nu-cmd-lang'...
$ git fetch origin 274fcd6666c3ecb642e93f07c687ee463bf27411:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-cmd-lang
 * [new ref]         274fcd6666c3ecb642e93f07c687ee463bf27411 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 274fcd6 Update to 0.86.0