$ git clone -n https://src.fedoraproject.org/rpms/oxygen-icon-theme.git /var/lib/mock/f40-build-1179315-21865/root/chroot_tmpdir/scmroot/oxygen-icon-theme
Cloning into '/var/lib/mock/f40-build-1179315-21865/root/chroot_tmpdir/scmroot/oxygen-icon-theme'...
$ git fetch origin f4f11db0afae26d1b856323f54bf68afc9c0d6fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oxygen-icon-theme
 * [new ref]         f4f11db0afae26d1b856323f54bf68afc9c0d6fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4f11db 6.0.0