$ git clone -n https://src.fedoraproject.org/rpms/rust-flume.git /var/lib/mock/f40-build-1794028-24862/root/chroot_tmpdir/scmroot/rust-flume
Cloning into '/var/lib/mock/f40-build-1794028-24862/root/chroot_tmpdir/scmroot/rust-flume'...
$ git fetch origin 1d4223cb8bce291d94cf5439a1ec89ff2edd4fd7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-flume
 * [new ref]         1d4223cb8bce291d94cf5439a1ec89ff2edd4fd7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d4223c Add upstream patch to fix compiling tests with crossbeam-channel >=0.5.13