$ git clone -n https://src.fedoraproject.org/rpms/glibmm2.68.git /var/lib/mock/f40-build-806406-145129/root/chroot_tmpdir/scmroot/glibmm2.68
Cloning into '/var/lib/mock/f40-build-806406-145129/root/chroot_tmpdir/scmroot/glibmm2.68'...
$ git reset --hard df6dbf18bb06521eaca90e9782b7e596dc5393f6
HEAD is now at df6dbf1 Update to 2.80.0