$ git clone -n https://src.fedoraproject.org/rpms/sagemath.git /var/lib/mock/f31-build-90992-31956/root/thebuilddir/tmp/scmroot/sagemath
Cloning into '/var/lib/mock/f31-build-90992-31956/root/thebuilddir/tmp/scmroot/sagemath'...
$ git reset --hard 09a0095ee698db806232b4b47e30e09ff2f656c7
HEAD is now at 09a0095 Oops, gap-pkg-happrime is not yet in Fedora.