$ git clone -n https://src.fedoraproject.org/rpms/rust-plotters-backend.git /var/lib/mock/f41-build-side-1-3134873-39763/root/chroot_tmpdir/scmroot/rust-plotters-backend
Cloning into '/var/lib/mock/f41-build-side-1-3134873-39763/root/chroot_tmpdir/scmroot/rust-plotters-backend'...
$ git fetch origin 88890b2054338729afbd826b11e9351612b71fed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-plotters-backend
 * [new ref]         88890b2054338729afbd826b11e9351612b71fed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88890b2 no longer needed