$ git clone -n git://pkgs.fedoraproject.org/rpms/R-Biostrings /var/lib/mock/f29-build-1031-455/root/thebuilddir/tmp/scmroot/R-Biostrings
Cloning into '/var/lib/mock/f29-build-1031-455/root/thebuilddir/tmp/scmroot/R-Biostrings'...
$ git reset --hard 720f2177c94544d5bea4b64e853dd16eba5fdd7c
HEAD is now at 720f217 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild