$ git clone -n https://src.fedoraproject.org/rpms/wget.git /var/lib/mock/f40-build-2045165-48779/root/chroot_tmpdir/scmroot/wget
Cloning into '/var/lib/mock/f40-build-2045165-48779/root/chroot_tmpdir/scmroot/wget'...
$ git fetch origin 6c640f76f2b4837e96ffda3843c34aeca8c1471c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wget
 * [new ref]         6c640f76f2b4837e96ffda3843c34aeca8c1471c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c640f7 Resolves: #2226508 - FTBFS in Fedora rawhide/f39w