$ git clone -n https://src.fedoraproject.org/rpms/glibc.git /var/lib/mock/f29-build-4760-1127/root/thebuilddir/tmp/scmroot/glibc
Cloning into '/var/lib/mock/f29-build-4760-1127/root/thebuilddir/tmp/scmroot/glibc'...
$ git reset --hard bfa9f404d275ded61cc259388c58c16bbb96ff92
HEAD is now at bfa9f40 Auto-sync with upstream branch master