$ git clone -n https://src.fedoraproject.org/rpms/R-readr.git /var/lib/mock/f45-build-48327-874/root/chroot_tmpdir/scmroot/R-readr
Cloning into '/var/lib/mock/f45-build-48327-874/root/chroot_tmpdir/scmroot/R-readr'...
$ git fetch origin 8ca3f2608227a711beabaaed42e61938dd501a10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-readr
 * [new ref]         8ca3f2608227a711beabaaed42e61938dd501a10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ca3f26 Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild