$ git clone -n https://src.fedoraproject.org/rpms/gthumb.git /var/lib/mock/f31-build-108720-33868/root/chroot_tmpdir/scmroot/gthumb
Cloning into '/var/lib/mock/f31-build-108720-33868/root/chroot_tmpdir/scmroot/gthumb'...
$ git reset --hard a8c1b191963f885d031907e31f8186cd7917ed72
HEAD is now at a8c1b19 Update to 3.8.1