$ git clone -n https://src.fedoraproject.org/rpms/rust-quinn-udp.git /var/lib/mock/f42-build-side-1-3586308-46915/root/chroot_tmpdir/scmroot/rust-quinn-udp
Cloning into '/var/lib/mock/f42-build-side-1-3586308-46915/root/chroot_tmpdir/scmroot/rust-quinn-udp'...
$ git fetch origin a316f86fa28905a87ce1848b0b0fde8cd20620d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quinn-udp
 * [new ref]         a316f86fa28905a87ce1848b0b0fde8cd20620d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a316f86 Update to version 0.5.13; Fixes RHBZ#2363215