$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-audio-sys.git /var/lib/mock/f38-build-side-43-rust-devel-1400237-31148/root/chroot_tmpdir/scmroot/rust-gstreamer-audio-sys
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1400237-31148/root/chroot_tmpdir/scmroot/rust-gstreamer-audio-sys'...
$ git fetch origin d97215d8f7fb369ab1a014b77d116821e1690e6f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-audio-sys
 * [new ref]         d97215d8f7fb369ab1a014b77d116821e1690e6f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d97215d Update to 0.21.0