$ git clone -n https://src.fedoraproject.org/rpms/glibmm2.68.git /var/lib/mock/f37-build-649990-72752/root/chroot_tmpdir/scmroot/glibmm2.68
Cloning into '/var/lib/mock/f37-build-649990-72752/root/chroot_tmpdir/scmroot/glibmm2.68'...
$ git reset --hard fbab3679af922f6339d53489e576cbae5a35c579
HEAD is now at fbab367 Update to 2.74.0