$ git clone -n https://src.fedoraproject.org/rpms/rust-quinn-proto.git /var/lib/mock/f42-build-side-1-3533145-46342/root/chroot_tmpdir/scmroot/rust-quinn-proto
Cloning into '/var/lib/mock/f42-build-side-1-3533145-46342/root/chroot_tmpdir/scmroot/rust-quinn-proto'...
$ git fetch origin d1eb5d94c44db96d1cc378d5008ce30f74dc1f14:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quinn-proto
 * [new ref]         d1eb5d94c44db96d1cc378d5008ce30f74dc1f14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1eb5d9 Update to version 0.11.11; Fixes RHBZ#2361683