$ git clone -n https://src.fedoraproject.org/rpms/R-reticulate.git /var/lib/mock/f43-build-side-110352-58919982-6569255/root/chroot_tmpdir/scmroot/R-reticulate
Cloning into '/var/lib/mock/f43-build-side-110352-58919982-6569255/root/chroot_tmpdir/scmroot/R-reticulate'...
$ git fetch origin 04fb7e0b0c26d68a6a7227140cbf58e9d2593912:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-reticulate
 * [new ref]         04fb7e0b0c26d68a6a7227140cbf58e9d2593912 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04fb7e0 R-maint-sig mass rebuild