$ git clone -n https://src.fedoraproject.org/rpms/boost-http-server.git /var/lib/mock/f40-build-2586631-62459/root/chroot_tmpdir/scmroot/boost-http-server
Cloning into '/var/lib/mock/f40-build-2586631-62459/root/chroot_tmpdir/scmroot/boost-http-server'...
$ git fetch origin cb78f73e4af302938db813fad33c93c58911bf0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/boost-http-server
 * [new ref]         cb78f73e4af302938db813fad33c93c58911bf0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb78f73 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild