$ git clone -n https://src.fedoraproject.org/rpms/nghttp2.git /var/lib/mock/f40-build-786667-134489/root/chroot_tmpdir/scmroot/nghttp2
Cloning into '/var/lib/mock/f40-build-786667-134489/root/chroot_tmpdir/scmroot/nghttp2'...
$ git fetch origin cac4c43392213b3a6c67be9b4d24ce4924eb16de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nghttp2
 * [new ref]         cac4c43392213b3a6c67be9b4d24ce4924eb16de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cac4c43 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild