$ git clone -n https://src.fedoraproject.org/rpms/R-broom.git /var/lib/mock/f38-build-side-42-init-devel-655179-26594/root/chroot_tmpdir/scmroot/R-broom
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-655179-26594/root/chroot_tmpdir/scmroot/R-broom'...
$ git fetch origin 8501a24ef3c53a06245ac346d1cf9191bf318508:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-broom
 * [new ref]         8501a24ef3c53a06245ac346d1cf9191bf318508 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8501a24 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild