$ git clone -n https://src.fedoraproject.org/rpms/rust-fake.git /var/lib/mock/f40-build-2659511-66918/root/chroot_tmpdir/scmroot/rust-fake
Cloning into '/var/lib/mock/f40-build-2659511-66918/root/chroot_tmpdir/scmroot/rust-fake'...
$ git fetch origin 7909ca8514721ba51272e681589e4802e4a2d0d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fake
 * [new ref]         7909ca8514721ba51272e681589e4802e4a2d0d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7909ca8 Disable a test that fails due to floating point accuracy issues