$ git clone -n https://src.fedoraproject.org/rpms/R-httr.git /var/lib/mock/f40-build-2114666-50675/root/chroot_tmpdir/scmroot/R-httr
Cloning into '/var/lib/mock/f40-build-2114666-50675/root/chroot_tmpdir/scmroot/R-httr'...
$ git fetch origin 8c1cb4b4e4f13a1968ed53c971fec85a01980ff0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-httr
 * [new ref]         8c1cb4b4e4f13a1968ed53c971fec85a01980ff0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c1cb4b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild