$ git clone -n https://src.fedoraproject.org/rpms/ghc-base64-bytestring.git /var/lib/mock/f31-build-54013-27934/root/thebuilddir/tmp/scmroot/ghc-base64-bytestring
Cloning into '/var/lib/mock/f31-build-54013-27934/root/thebuilddir/tmp/scmroot/ghc-base64-bytestring'...
$ git reset --hard a2b504cb31b615cc6686a26383307252c5770aac
HEAD is now at a2b504c update to 1.0.0.2