$ git clone -n https://src.fedoraproject.org/rpms/R-diffobj.git /var/lib/mock/f40-build-2032092-47668/root/chroot_tmpdir/scmroot/R-diffobj
Cloning into '/var/lib/mock/f40-build-2032092-47668/root/chroot_tmpdir/scmroot/R-diffobj'...
$ git fetch origin 48df7daeed82bd31480ddbabbaaeb93d3abe9709:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-diffobj
 * [new ref]         48df7daeed82bd31480ddbabbaaeb93d3abe9709 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48df7da Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild