$ git clone -n https://src.fedoraproject.org/rpms/R-gtools.git /var/lib/mock/f39-build-1524025-36022/root/chroot_tmpdir/scmroot/R-gtools
Cloning into '/var/lib/mock/f39-build-1524025-36022/root/chroot_tmpdir/scmroot/R-gtools'...
$ git fetch origin 8421e6ae2b42e715eab742de6c27c3f2479dc62d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-gtools
 * [new ref]         8421e6ae2b42e715eab742de6c27c3f2479dc62d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8421e6a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild