$ git clone -n https://src.fedoraproject.org/rpms/rust-nuon.git /var/lib/mock/f41-build-side-1-3149610-40519/root/chroot_tmpdir/scmroot/rust-nuon
Cloning into '/var/lib/mock/f41-build-side-1-3149610-40519/root/chroot_tmpdir/scmroot/rust-nuon'...
$ git fetch origin f75988c9aa0f6dc173cefcb06897b71401c85754:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nuon
 * [new ref]         f75988c9aa0f6dc173cefcb06897b71401c85754 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f75988c Update to version 0.99.1