$ git clone -n https://src.fedoraproject.org/rpms/wget2.git /var/lib/mock/f39-build-1625796-39206/root/chroot_tmpdir/scmroot/wget2
Cloning into '/var/lib/mock/f39-build-1625796-39206/root/chroot_tmpdir/scmroot/wget2'...
$ git fetch origin 559867b470a1d6f50af00ea072ff910d59f30c48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wget2
 * [new ref]         559867b470a1d6f50af00ea072ff910d59f30c48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 559867b Check gpg signature