$ git clone -n https://src.fedoraproject.org/rpms/rust-quinn-proto.git /var/lib/mock/f40-build-2249036-53977/root/chroot_tmpdir/scmroot/rust-quinn-proto
Cloning into '/var/lib/mock/f40-build-2249036-53977/root/chroot_tmpdir/scmroot/rust-quinn-proto'...
$ git fetch origin ee220bc424746ce12c0007e0c582f3735ac08e1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quinn-proto
 * [new ref]         ee220bc424746ce12c0007e0c582f3735ac08e1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee220bc Update to version 0.10.6; Fixes RHBZ#2248491