$ git clone -n https://src.fedoraproject.org/rpms/R-rprojroot.git /var/lib/mock/f40-build-2305179-57067/root/chroot_tmpdir/scmroot/R-rprojroot
Cloning into '/var/lib/mock/f40-build-2305179-57067/root/chroot_tmpdir/scmroot/R-rprojroot'...
$ git fetch origin 7a9a8cfde6ce47da49887f76727dc5970d7b9595:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rprojroot
 * [new ref]         7a9a8cfde6ce47da49887f76727dc5970d7b9595 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a9a8cf Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild