$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-audio.git /var/lib/mock/f45-build-42170-791/root/chroot_tmpdir/scmroot/rust-gstreamer-audio
Cloning into '/var/lib/mock/f45-build-42170-791/root/chroot_tmpdir/scmroot/rust-gstreamer-audio'...
$ git fetch origin 49d24bec0ed793d152cbc71aaf2c58e7dd5e95a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-audio
 * [new ref]         49d24bec0ed793d152cbc71aaf2c58e7dd5e95a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49d24be Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild