$ git clone -n https://src.fedoraproject.org/rpms/vcpkg.git /var/lib/mock/f40-build-804522-144549/root/chroot_tmpdir/scmroot/vcpkg
Cloning into '/var/lib/mock/f40-build-804522-144549/root/chroot_tmpdir/scmroot/vcpkg'...
$ git fetch origin 687b8ccc19cde602157c88984b1669033772c741:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vcpkg
 * [new ref]         687b8ccc19cde602157c88984b1669033772c741 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 687b8cc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild