$ git clone -n https://src.fedoraproject.org/rpms/mesa.git /var/lib/mock/f31-build-95884-32759/root/thebuilddir/tmp/scmroot/mesa
Cloning into '/var/lib/mock/f31-build-95884-32759/root/thebuilddir/tmp/scmroot/mesa'...
$ git reset --hard c5cbb9a96fa670aa276915b7fa4236ee9f67c42b
HEAD is now at c5cbb9a Bring back egl.pc for now