$ git clone -n https://src.fedoraproject.org/rpms/virtualbox-guest-additions.git /var/lib/mock/f38-build-side-42-init-devel-717148-27296/root/chroot_tmpdir/scmroot/virtualbox-guest-additions
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-717148-27296/root/chroot_tmpdir/scmroot/virtualbox-guest-additions'...
$ git fetch origin c022d95a668b97edd52a56d6e5836aa574b9af32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/virtualbox-guest-additions
 * [new ref]         c022d95a668b97edd52a56d6e5836aa574b9af32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c022d95 Update virtualbox-guest-additions to 7.0.6 (#2161718)