$ git clone -n https://src.fedoraproject.org/rpms/R-fastmap.git /var/lib/mock/f33-build-623234-67558/root/chroot_tmpdir/scmroot/R-fastmap
Cloning into '/var/lib/mock/f33-build-623234-67558/root/chroot_tmpdir/scmroot/R-fastmap'...
$ git reset --hard 261fee2b6c9abb3b3ea02d4b48b4ce8b2505c56f
HEAD is now at 261fee2 Update to latest version.