$ git clone -n https://src.fedoraproject.org/rpms/adwaita-icon-theme.git /var/lib/mock/f42-build-3426665-45197/root/chroot_tmpdir/scmroot/adwaita-icon-theme
Cloning into '/var/lib/mock/f42-build-3426665-45197/root/chroot_tmpdir/scmroot/adwaita-icon-theme'...
$ git fetch origin 2f28d5c51b5f12d162fa2620c1f16fb636cd09e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/adwaita-icon-theme
 * [new ref]         2f28d5c51b5f12d162fa2620c1f16fb636cd09e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f28d5c Update to 48.0