$ git clone -n https://src.fedoraproject.org/rpms/R-httpuv.git /var/lib/mock/f40-build-2304710-57038/root/chroot_tmpdir/scmroot/R-httpuv
Cloning into '/var/lib/mock/f40-build-2304710-57038/root/chroot_tmpdir/scmroot/R-httpuv'...
$ git fetch origin dbb519e6926576a86f00d0d37c9d82aa71df2dea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-httpuv
 * [new ref]         dbb519e6926576a86f00d0d37c9d82aa71df2dea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbb519e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild