$ git clone -n https://src.fedoraproject.org/rpms/gtkmm4.0.git /var/lib/mock/f41-build-836323-158802/root/chroot_tmpdir/scmroot/gtkmm4.0
Cloning into '/var/lib/mock/f41-build-836323-158802/root/chroot_tmpdir/scmroot/gtkmm4.0'...
$ git reset --hard 068e19d32931d1275213a4a6d5a03b9d8933e294
HEAD is now at 068e19d Update to 4.15.0