$ git clone -n https://src.fedoraproject.org/rpms/R-devtools.git /var/lib/mock/f40-build-2360179-60329/root/chroot_tmpdir/scmroot/R-devtools
Cloning into '/var/lib/mock/f40-build-2360179-60329/root/chroot_tmpdir/scmroot/R-devtools'...
$ git fetch origin 6dcf1c818237ae1a82beeb11b1aec21500b60bdc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-devtools
 * [new ref]         6dcf1c818237ae1a82beeb11b1aec21500b60bdc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dcf1c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild