$ git clone -n https://src.fedoraproject.org/rpms/R-readxl.git /var/lib/mock/f40-build-2285567-55681/root/chroot_tmpdir/scmroot/R-readxl
Cloning into '/var/lib/mock/f40-build-2285567-55681/root/chroot_tmpdir/scmroot/R-readxl'...
$ git fetch origin 199e087a15164f14169cb51cbb792361edd7ee3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-readxl
 * [new ref]         199e087a15164f14169cb51cbb792361edd7ee3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 199e087 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild