$ git clone -n https://src.fedoraproject.org/rpms/glibmm2.68.git /var/lib/mock/f40-build-799781-142595/root/chroot_tmpdir/scmroot/glibmm2.68
Cloning into '/var/lib/mock/f40-build-799781-142595/root/chroot_tmpdir/scmroot/glibmm2.68'...
$ git reset --hard 030496576c40e6ad172b37a6a889eb53b47b2d0c
HEAD is now at 0304965 Update to 2.78.1