$ git clone -n https://src.fedoraproject.org/rpms/rust-quinn-udp.git /var/lib/mock/f40-build-2269334-54765/root/chroot_tmpdir/scmroot/rust-quinn-udp
Cloning into '/var/lib/mock/f40-build-2269334-54765/root/chroot_tmpdir/scmroot/rust-quinn-udp'...
$ git fetch origin e76381f668b6fe4ea2d78b7b1e75fe671b1973fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quinn-udp
 * [new ref]         e76381f668b6fe4ea2d78b7b1e75fe671b1973fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e76381f Initial import (#2246721)