$ git clone -n https://src.fedoraproject.org/rpms/boost-http-server.git /var/lib/mock/f38-build-710699-93564/root/chroot_tmpdir/scmroot/boost-http-server
Cloning into '/var/lib/mock/f38-build-710699-93564/root/chroot_tmpdir/scmroot/boost-http-server'...
$ git fetch origin d241bc40828349b6888c7ccf6b217bb1b5bf9f67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/boost-http-server
 * [new ref]         d241bc40828349b6888c7ccf6b217bb1b5bf9f67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d241bc4 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild