MarsSeed [1] filed a deletion request for gstreamer113 [2]: There is no gstreamer version 113 (one hundred and thirteen).
This package was made for use by one package, cutter-test. Please don't duplicate repo packages for such a purpose; build your specifically needed gstreamer version inline in the cutter-test PKGBUILD, and install it in a location that is specific to cutter-test only. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gstreamer113/
